Solano County, California

{{Short description|County in California, United States}} {{Use American English|date=June 2025}} {{Use mdy dates|date=April 2024}} {{Infobox settlement | official_name = Solano County | settlement_type = County  | image_skyline = {{multiple image | total_width = 280 | border = infobox | perrow = 1/2/2/1 | caption_align = center | image1 = Aerial view of Mare Island and Vallejo, March 2022 (cropped).JPG | caption1 = Vallejo and the Napa River | image2 = USA-Benicia-Clock Tower-18.jpg | caption2 = Benicia | image3 = Old Solano Courthouse - April 2023 - Sarah Stierch 01 (cropped).jpg | caption3 = Fairfield | image4 = Old-town-hall-vacaville-ca (cropped).jpg | caption4 = Vacaville | image5 = Veterans Hall and Solano Transportation Authority in Suisun City (cropped).jpg | caption5 = Suisun City | image6 = Mount Vaca and Blue Ridge, Solano County (cropped).jpg | caption6 = Mount Vaca and the Vaca Mountains }} | image_flag = Flag of Solano County, California.gif | image_seal = Seal of Solano County, California.png | named_for = Chief Solano of the Suisun people | subdivision_type = Country | subdivision_name = United States | subdivision_type1 = State | subdivision_name1 = California | subdivision_type2 = Region | subdivision_name2 = Bay Area | seat_type = County seat | seat = Fairfield | seat1_type = Largest city | seat1 = Vallejo (population) Fairfield (area) | unit_pref = US | area_total_sq_mi = 906 | area_land_sq_mi = 810 | area_water_sq_mi = 96 | elevation_max_footnotes = <ref>{{Cite web|url=http://www.peakbagger.com/peak.aspx?pid=1184|title=Mount Vaca|publisher=Peakbagger.com|access-date=April 8, 2015}}</ref> | elevation_max_ft = 2822 | government_type = Council–Administrator | leader_title = Chair | leader_name = Monica Brown | leader_title1 = Vice Chair | leader_name1 = Cassandra James | leader_title2 = Chair Pro Tem | leader_name2 = Wanda Williams | governing_body = {{Collapsible list | title = Board of Supervisors<ref>{{cite web | url=https://www.solanocounty.com/depts/bos/members/default.asp | title=Solano County - Board Members }}</ref> | 1 = Cassandra James | 2 = Monica Brown | 3 = Wanda Williams | 4 = John Vasquez | 5 = Mitch Mashburn }}

| leader_title4 = County Administrator<ref>{{cite web | url=https://www.solanocounty.com/depts/county_admin/default.asp | title=Solano County - County Administrator }}</ref> | leader_name4 = William F. Emlen | population_as_of = 2020 | population_footnotes = | population_total = 453491 | population_density_sq_mi = 552 | pop_est_as_of = 2025 | population_est = 455376 {{gain}} | demographics_type2 = GDP | demographics2_footnotes = <ref>{{Cite web|title=Gross Domestic Product: All Industries in Solano County, CA |url=https://fred.stlouisfed.org/series/GDPALL06095|work=Federal Reserve Economic Data |publisher=Federal Reserve Bank of St. Louis}}</ref> |demographics2_title1 = Total |demographics2_info1 = $35.408 billion (2022) | established_title = Incorporated | established_date = February 18, 1850<ref name=csac>{{cite web |url= http://www.counties.org/general-information/chronology |title= Chronology |publisher= California State Association of Counties |access-date= February 6, 2015 |archive-date= January 29, 2016 |archive-url= https://web.archive.org/web/20160129193152/http://www.counties.org/general-information/chronology |url-status= dead }}</ref> | timezone = Pacific Time Zone | utc_offset = −8 | timezone_DST = Pacific Daylight Time | utc_offset_DST = −7 | area_code_type = Area code | area_codes = 707, 369 | image_map = {{Maplink|frame=yes|plain=yes|frame-width=250|frame-align=center|type=shape|fill=#ffffff|fill-opacity=0|stroke-width=3}} | map_caption = Interactive map of Solano County | image_map1 = Map of California highlighting Solano County.svg | mapsize1 = 200px | map_caption1 = Location in the state of California | coordinates = {{Coord|38.27|-121.94|display=title,inline|type:adm2nd_region:US-CA_source:UScensus1990}} | blank_name = FIPS code | blank_info = 06-095 | blank1_name = GNIS feature ID | blank1_info = {{GNIS 4|277312}} | blank_name_sec2 = Congressional districts | blank_info_sec2 = 4th, 7th, 8th | website = {{URL|www.solanocounty.com}} }}

'''Solano County''' ({{IPAc-en|s|ə|ˈ|l|ɑː|n|oʊ|audio=En-us-solano.ogg}}) is a county in the U.S. state of California. As of the 2020 census, its population was 453,491.<ref>{{Cite web|title=Solano County, California|url=https://data.census.gov/cedsci/profile?g=0500000US06095|website=United States Census Bureau|accessdate=January 30, 2022}}</ref> The county seat is Fairfield.<ref name="GR6">{{cite web|url=http://www.naco.org/Counties/Pages/FindACounty.aspx|access-date=June 7, 2011|title=Find a County|publisher=National Association of Counties}}</ref>

Solano County comprises the Vallejo–Fairfield metropolitan statistical area, which is also included in the San Jose–San Francisco–Oakland, combined statistical area.<ref name=landis>{{cite book |chapter-url=https://books.google.com/books?id=JZZZq08UGhwC&pg=PA84 |page=84|first1=John D.|last1=Landis|first2=Michael|last2=Reilly|chapter=How We Will Grow: Baseline Projections of California's Urban Footprint Through the Year 2011 |editor-first=Subhrajit |editor-last=Guhathakurta |title=Integrated Land Use and Environmental Models: A Survey of Current Applications and Research |publisher=Springer |year=2003 |isbn= 9783540005766|access-date=March 14, 2012}}</ref> Solano County is the northeastern county in the nine-county San Francisco Bay Area region.

==History== Solano County was one of the original counties of California, created in 1850 at the time of statehood.

At the request of General Mariano Guadalupe Vallejo, the county was named for Chief Solano of the Suisun people, a Native American tribe of the region and Vallejo's close ally. Chief Solano at one time led the tribes between the Petaluma River and the Sacramento River. The chief was also called ''Sem-Yeto'', which signifies "brave or fierce hand". The chief was given the Spanish name Francisco Solano during baptism at the Catholic Mission, and is named after the Spanish Franciscan missionary Father Francisco Solano.

Travis Air Force Base is located just east of Fairfield. Between 2017 and 2023, California Forever purchased over 50,000 acres of land in the county for an estimated $900 million to develop a new city.<ref>{{Cite web |title=The Botched Reveal of California Forever |url=https://www.theinformation.com/articles/the-botched-reveal-of-california-forever |access-date=September 24, 2023 |website=The Information}}</ref><ref>{{Cite news |last=Dougherty |first=Conor |last2=Griffith |first2=Erin |date=August 25, 2023 |title=The Silicon Valley Elite Who Want to Build a City From Scratch |language=en-US |work=The New York Times |url=https://www.nytimes.com/2023/08/25/business/land-purchases-solano-county.html |access-date=September 24, 2023 |issn=0362-4331}}</ref>

==Region== Solano County is the easternmost county of the North Bay.<ref name=landis /> As such, it is sometimes reported by news agencies as being in the East Bay.<ref>{{cite web|title=Solano County's unemployment rate soars to 6.4 percent|work=abc7news.com|url=https://abc7news.com/archive/6090678/|date=April 18, 2008|first=John|last=Alston|access-date=March 14, 2012|archive-url=https://web.archive.org/web/20130801032955/http://abclocal.go.com/kgo/story?section=news%2Flocal&id=6090678|archive-date=August 1, 2013|url-status=live}}</ref><ref>{{cite news|url=https://news.google.com/newspapers?id=W30zAAAAIBAJ&sjid=aTIHAAAAIBAJ&pg=6981%2C3423257|title=East Bay is a Socioeconomic Dichotomy|first=Dan|last=Walters|date=March 29, 1986|work=Lodi News-Sentinel|page=12|access-date=March 14, 2012}}</ref><ref>{{cite news|title=Bay Area median home price falls below $500,000|work=San Francisco Business Times|url=http://www.bizjournals.com/eastbay/stories/2008/07/14/daily53.html?page=all|access-date=March 14, 2012|date=July 17, 2008}}</ref> Additionally, a portion of the county extends into the Sacramento Valley, geographically.

==Geography== According to the U.S. Census Bureau, the county has a total area of {{convert|906|sqmi}}, of which {{convert|84|sqmi}}, comprising 9.3%, are covered by water.<ref name="GR1">{{cite web|url=https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html|publisher=United States Census Bureau|access-date=April 23, 2011|date=February 12, 2011|title=US Gazetteer files: 2010, 2000, and 1990}}</ref>

Solano County had several cinnabar mines that operated in the first half of the 20th century, including the Hastings Mine and St. John's Mine.<ref name=californiaEA1989>{{cite book|first1=C. Michael|last1=Hogan|first2=Marc|last2=Papineau|chapter=Environmental Assessment of the Columbus Parkway Widening between Ascot Parkway and the Northgate Development, Vallejo|title=Earth Metrics Inc. Report 7853|publisher=California State Clearinghouse|date=September 1989}}</ref>

===Adjacent counties=== *Contra Costa County, California - south *Sonoma County, California - west *Napa County, California - west *Yolo County, California - north *Sacramento County, California - east

===National protected area=== * San Pablo Bay National Wildlife Refuge (part)

===Flora and fauna===

Solano County has a number of rare and endangered species, including the delta green ground beetle,<ref>{{Cite web |title=Delta Green Ground Beetle (Elaphrus viridis) {{!}} U.S. Fish & Wildlife Service |url=https://www.fws.gov/species/delta-green-ground-beetle-elaphrus-viridis |access-date=February 8, 2024 |website=www.fws.gov |language=en}}</ref> the wildflower ''Lasthenia conjugens'', commonly known as Contra Costa goldfields,<ref>{{Cite web |date=July 2012 |title=CONTRA COSTA GOLDFIELDS |url=https://www.scwa2.com/documents/hcp/appendix/H-6.Contra%20Costa%20Goldfields.pdf |website=Solano County Water Agency}}</ref> and the annual plant ''Legenere limosa'' or false Venus' looking glass.<ref>{{Cite web |date=July 2012 |title=LEGENERE |url=https://www.scwa2.com/documents/hcp/appendix/H-6.Legenere.pdf |website=Solano County Water Agency}}</ref>

==Transportation== {{See also|Rail transportation in Solano County, California}}

===Major highways=== thumb|Highway 37 Bridge over the Napa River in Vallejo thumb|A train sits behind a stop sign at an intersection in Cordelia, California. *{{jct|state=CA|I|80}} *{{jct|state=CA|I|505}} *{{jct|state=CA|I|680}} *{{jct|state=CA|I|780}} *{{jct|state=CA|SR|12}} *{{jct|state=CA|SR|29}} *{{jct|state=CA|SR|37}} *{{jct|state=CA|SR|84}} *{{jct|state=CA|SR|113}}

===Public transportation=== Solano County is served by several transit agencies: *SolTrans, formed as a merger between these two existing transit agencies: **Vallejo Transit, which also formerly operated the Baylink Ferry to San Francisco **Benicia Breeze *San Francisco Bay Ferry, with a terminal in Vallejo *Fairfield and Suisun Transit *Vacaville City Coach *Rio Vista Delta Breeze Each agency interconnects with the others, enabling transit trips throughout the county. Service also connects with BART stations in Contra Costa County. Transit links are provided to Napa, Yolo and Sacramento counties as well.

Greyhound and Amtrak provide long-distance intercity service.

===Airports=== General aviation airports in Solano County that are open to the public include the Nut Tree Airport and Rio Vista Municipal Airport.

==Demographics== {{US Census population | 1850 = 580 | 1860 = 7169 | 1870 = 16871 | 1880 = 18475 | 1890 = 20946 | 1900 = 24143 | 1910 = 27559 | 1920 = 40602 | 1930 = 40834 | 1940 = 49118 | 1950 = 104833 | 1960 = 134597 | 1970 = 169941 | 1980 = 235203 | 1990 = 340421 | 2000 = 394542 | 2010 = 413344 | 2020 = 453491 |estyear=2025 |estimate=455376 |estref=<ref name="USCensusEst2025">{{cite web|url=https://www.census.gov/programs-surveys/popest/data/tables.html|title=Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2025|publisher=United States Census Bureau|access-date=April 10, 2026}}</ref> {{increase}} | align-fn = center | footnote = U.S. Decennial Census<ref name="DecennialCensus">{{cite web|url=https://www.census.gov/prod/www/decennial.html|title=Census of Population and Housing from 1790-2000|publisher=US Census Bureau|access-date=January 24, 2022}}</ref> 1790–1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=May 31, 2014}}</ref> 1900–1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/ca190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=May 31, 2014}}</ref> 1990–2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=May 31, 2014}}</ref> 2010<ref name=2010CensusP2/> 2020<ref name=2020CensusP2/> | align = right }}

===2020 census===

As of the 2020 census, the county had a population of 453,491. The median age was 39.0 years. 21.8% of residents were under the age of 18 and 16.5% of residents were 65 years of age or older. For every 100 females there were 98.3 males, and for every 100 females age 18 and over there were 96.7 males age 18 and over.<ref name="Census2020DP">{{cite web|title=2020 Decennial Census Demographic Profile (DP1)|url=https://api.census.gov/data/2020/dec/dp?get=NAME,DP1_0021P,DP1_0024P,DP1_0025C,DP1_0049C,DP1_0045C,DP1_0069C,DP1_0073C,DP1_0125P,DP1_0126P,DP1_0129P,DP1_0138P,DP1_0139P,DP1_0141P,DP1_0142P,DP1_0143P,DP1_0145P,DP1_0146P,DP1_0147C,DP1_0148C,DP1_0149C,DP1_0156C,DP1_0157C,DP1_0158C,DP1_0159P,DP1_0160P&for=county%3A095&in=state%3A06|website=United States Census Bureau|year=2021|access-date=December 21, 2025|df=mdy}}</ref><ref name="Census2020PL">{{cite web|title=2020 Decennial Census Redistricting Data (Public Law 94-171)|url=https://api.census.gov/data/2020/dec/pl?get=NAME,P1_001N,P1_003N,P1_004N,P1_005N,P1_006N,P1_007N,P1_008N,P1_009N,P2_001N,P2_002N,H1_001N,H1_002N&for=county%3A095&in=state%3A06|website=United States Census Bureau|year=2021|access-date=December 21, 2025|df=mdy}}</ref>

The racial makeup of the county was 38.8% White, 13.7% Black or African American, 1.2% American Indian and Alaska Native, 16.0% Asian, 0.9% Native Hawaiian and Pacific Islander, 14.7% from some other race, and 14.7% from two or more races. Hispanic or Latino residents of any race comprised 28.3% of the population.<ref name="Census2020PL"/>

95.5% of residents lived in urban areas, while 4.5% lived in rural areas.<ref name="Census2020DHC">{{cite web|title=2020 Decennial Census Demographic and Housing Characteristics (DHC)|url=https://api.census.gov/data/2020/dec/dhc?get=NAME,P2_002N,P2_003N&for=county%3A095&in=state%3A06|website=United States Census Bureau|year=2023|access-date=December 21, 2025|df=mdy}}</ref>

There were 155,924 households in the county, of which 34.2% had children under the age of 18 living with them and 26.9% had a female householder with no spouse or partner present. About 21.6% of all households were made up of individuals and 9.8% had someone living alone who was 65 years of age or older.<ref name="Census2020DP"/>

There were 162,237 housing units, of which 3.9% were vacant. Among occupied housing units, 62.4% were owner-occupied and 37.6% were renter-occupied. The homeowner vacancy rate was 0.9% and the rental vacancy rate was 4.4%.<ref name="Census2020DP"/>

===Racial and ethnic composition===

{| class="wikitable sortable" style="text-align:center;" |+'''Solano County, California – Racial and ethnic composition''' {{nobold|''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.''}} !Race / Ethnicity (''NH = Non-Hispanic'') !Pop 1980<ref>{{Cite web |title=California: 1980, General Social and Economic Characteristics, Part 1 - Table 59: Persons by Race, Hispanic Origin, and Sex|website=United States Census Bureau|url=https://www2.census.gov/prod2/decennial/documents/1980a_caCs1-01.pdf|access-date=}}</ref> !Pop 1990<ref>{{Cite web |title=California: 1990, Part 1 - Table 5: Race and Hispanic Origin|website=United States Census Bureau|url=https://www2.census.gov/library/publications/decennial/1990/cp-1/cp-1-6-1.pdf |access-date=July 14, 2024}}</ref> !Pop 2000<ref name=2000CensusP004>{{Cite web|title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Solano County, California|url=https://data.census.gov/table?g=050XX00US06095&tid=DECENNIALSF12000.P004|website=United States Census Bureau |access-date= }}</ref> !Pop 2010<ref name=2010CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Solano County, California|url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US06095&tid=DECENNIALPL2010.P2|website=United States Census Bureau |access-date= }}</ref> !style="background-color: #ffffb3;" | Pop 2020<ref name=2020CensusP2>{{Cite web|title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Solano County, California|url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US06095&tid=DECENNIALPL2020.P2|website=United States Census Bureau |access-date= }}</ref> !% 1980 !% 1990 !% 2000 !% 2010 !style="background-color: #ffffb3;" |% 2020 |- |White alone (NH) |163,371 |207,476 |194,282 |168,628 |style='background: #ffffe6; |155,125 |69.46% |60.95% |49.24% |40.80% |style='background: #ffffe6; |34.21% |- |Black or African American alone (NH) |27,372 |43,858 |57,597 |58,743 |style='background: #ffffe6; |60,051 |11.64% |12.88% |14.60% |14.21% |style='background: #ffffe6; |13.24% |- |Native American or Alaska Native alone (NH) |1,981 |2,469 |2,194 |1,864 |style='background: #ffffe6; |1,624 |0.84% |0.73% |0.56% |0.45% |style='background: #ffffe6; |0.36% |- |Asian alone (NH) |17,377 |40,494 |49,399 |59,027 |style='background: #ffffe6; |70,953 |7.39% |11.90% |12.52% |14.28% |style='background: #ffffe6; |15.65% |- |Native Hawaiian or Pacific Islander alone (NH) |x <ref>included in the Asian category in the 1980 Census</ref> |x <ref>included in the Asian category in the 1990 Census</ref> |2,859 |3,243 |style='background: #ffffe6; |3,775 |x |x |0.72% |0.78% |style='background: #ffffe6; |0.83% |- |Other race alone (NH) |329 |607 |955 |1,463 |style='background: #ffffe6; |2,988 |0.14% |0.18% |0.24% |0.35% |style='background: #ffffe6; |0.66% |- |Mixed race or Multiracial (NH) |x <ref>not an option in the 1980 Census</ref> |x <ref>not an option in the 1990 Census</ref> |17,658 |21,020 |style='background: #ffffe6; |30,820 |x |x |4.48% |5.09% |style='background: #ffffe6; |6.80% |- |Hispanic or Latino (any race) |24,773 |45,517 |69,598 |99,356 |style='background: #ffffe6; |128,155 |10.53% |13.37% |17.64% |24.04% |style='background: #ffffe6; |28.26% |- |'''Total''' |'''235,203''' |'''340,421''' |'''394,542''' |'''413,344''' |style='background: #ffffe6; |'''453,491 ''' |'''100.00%''' |'''100.00%''' |'''100.00%''' |'''100.00%''' |style='background: #ffffe6; |'''100.00%''' |}

===2014=== A 2014 analysis by ''The Atlantic'' found Solano County to be the 5th most racially diverse county in the United States, behind Aleutians West Census Area and Aleutians East Borough in Alaska, Queens County in New York, and Alameda County in California.<ref>{{Cite news|url=https://www.theatlantic.com/national/archive/2014/04/mapping-racial-diversity-by-county/361388/|title=The 5 U.S. Counties Where Racial Diversity Is Highest—and Lowest|last=Narula|first=Svati Kirsten|date=April 29, 2014|work=The Atlantic|access-date=May 8, 2017|language=en-US}}</ref>

===2010=== The 2010 United States census reported that Solano County had a population of 413,344. The racial makeup of Solano County was 210,751 (51.0%) White, 60,750 (14.7%) African American, 3,212 (0.8%) Native American, 60,473 (14.6%) Asian, 3,564 (0.9%) Pacific Islander, 43,236 (10.5%) from other races, and 31,358 (7.6%) from two or more races. Hispanic or Latino of any race were 99,356 persons (24.0%).<ref>{{USCensus2010CA}}</ref> At 52,641 Filipinos in the county making up 12% of the population, Solano County has the largest percentage Filipino population of any county in the United States.{{Citation needed|date=March 2020}}

{| class="wikitable collapsible collapsed" style="margin-left: auto; margin-right: auto; border: none;" !colspan=10|Population racial makeup reported at 2010 United States census |- |{{center|'''County'''}} ||{{center|'''Total population'''}}||{{center|'''White'''}} ||{{center|'''African American'''}} || {{center|'''Native American'''}} || {{center|'''Asian'''}} || {{center|'''Pacific Islander'''}} || {{center|'''Other races'''}} || {{center|'''Two or more races'''}} ||{{center|'''Hispanic or Latino (of any race)'''}} |- |''' Solano County''' |align="right"|413,344||align="right"|210,751||align="right"|60,750||align="right"|3,212||align="right"|60,473||align="right"|3,564||align="right"|43,236||align="right"|31,358||align="right"|99,356 |- |{{center|'''Incorporated cities and towns'''}} ||{{center|'''Total population'''}}||{{center|'''White'''}} ||{{center|'''African American'''}} || {{center|'''Native American'''}} || {{center|'''Asian'''}} || {{center|'''Pacific Islander'''}} || {{center|'''Other races'''}} || {{center|'''Two or more races'''}} ||{{center|'''Hispanic or Latino (of any race)'''}} |- |'''Benicia''' |align="right"|26,997||align="right"|19,568||align="right"|1,510||align="right"|135||align="right"|2,989||align="right"|102||align="right"|895||align="right"|1,798||align="right"|3,248 |- |'''Dixon''' |align="right"|18,351||align="right"|13,023||align="right"|562||align="right"|184||align="right"|671||align="right"|58||align="right"|2,838||align="right"|1,015||align="right"|7,426 |- |'''Fairfield''' |align="right"|105,321||align="right"|48,407||align="right"|16,586||align="right"|869||align="right"|15,700||align="right"|1,149||align="right"|13,301||align="right"|9,309||align="right"|28,789 |- |'''Rio Vista''' |align="right"|7,360||align="right"|6,003||align="right"|372||align="right"|53||align="right"|359||align="right"|15||align="right"|288||align="right"|270||align="right"|914 |- |'''Suisun City''' |align="right"|28,111||align="right"|10,805||align="right"|5,713||align="right"|196||align="right"|5,348||align="right"|340||align="right"|2,898||align="right"|2,811||align="right"|6,753 |- |'''Vacaville''' |align="right"|92,428||align="right"|61,301||align="right"|9,510||align="right"|846||align="right"|5,606||align="right"|532||align="right"|8,136||align="right"|6,497||align="right"|21,121 |- |'''Vallejo''' |align="right"|115,942||align="right"|38,064||align="right"|25,572||align="right"|757||align="right"|28,895||align="right"|1,239||align="right"|12,759||align="right"|8,656||align="right"|26,165 |- |{{center|'''Census-designated places'''}} ||{{center|'''Total population'''}}||{{center|'''White'''}} ||{{center|'''African American'''}} || {{center|'''Native American'''}} || {{center|'''Asian'''}} || {{center|'''Pacific Islander'''}} || {{center|'''Other races'''}} || {{center|'''Two or more races'''}} ||{{center|'''Hispanic or Latino (of any race)'''}} |- |'''Allendale''' |align="right"|1,506||align="right"|1,239||align="right"|49||align="right"|22||align="right"|42||align="right"|2||align="right"|79||align="right"|73||align="right"|235 |- |'''Elmira''' |align="right"|188||align="right"|150||align="right"|1||align="right"|10||align="right"|2||align="right"|0||align="right"|17||align="right"|8||align="right"|47 |- |'''Green Valley''' |align="right"|1,625||align="right"|1,412||align="right"|41||align="right"|6||align="right"|82||align="right"|9||align="right"|20||align="right"|55||align="right"|121 |- |'''Hartley''' |align="right"|2,510||align="right"|1,956||align="right"|70||align="right"|24||align="right"|70||align="right"|16||align="right"|248||align="right"|126||align="right"|510 |- |{{center|'''Other unincorporated areas'''}} ||{{center|'''Total population'''}}||{{center|'''White'''}} ||{{center|'''African American'''}} || {{center|'''Native American'''}} || {{center|'''Asian'''}} || {{center|'''Pacific Islander'''}} || {{center|'''Other races'''}} || {{center|'''Two or more races'''}} ||{{center|'''Hispanic or Latino (of any race)'''}} |- |All others not CDPs (combined) |align="right"|13,005||align="right"|8,823||align="right"|764||align="right"|110||align="right"|709||align="right"|102||align="right"|1,757||align="right"|740||align="right"|4,027 |}

===2000=== At the 2000 census there were 394,542 people, 130,403 households, and 97,411 families in the county. The population density was {{convert|476|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 134,513 housing units at an average density of {{convert|162|/mi2|/km2}}. The racial makeup of the county was 56.4% White, 14.9% Black or African American, 0.8% Native American, 12.8% Asian, 0.8% Pacific Islander, 8.0% from other races, and 6.4% from two or more races. 17.64% of the population were Hispanic or Latino of any race. 8.5% were of German, 6.4% Irish and 6.0% English ancestry according to Census 2000. 75.7% spoke English, 12.1% Spanish and 6.6% Tagalog as their first language.<ref name="GR8">{{cite web|url=https://www.census.gov|publisher=United States Census Bureau|access-date=May 14, 2011|title=U.S. Census website}}</ref> Of the 130,403 households 39.9% had children under the age of 18 living with them, 55.7% were married couples living together, 13.8% had a female householder with no husband present, and 25.3% were non-families. 19.6% of households were one person and 6.5% were one person aged 65 or older. The average household size was 2.90 and the average family size was 3.33.

The age distribution was 28.3% under the age of 18, 9.2% from 18 to 24, 31.3% from 25 to 44, 21.7% from 45 to 64, and 9.5% 65 or older. The median age was 34 years. For every 100 females there were 101.5 males. For every 100 females age 18 and over, there were 100.2 males.

The median household income was $54,099 and the median family income was $60,597. Males had a median income of $41,787 versus $31,916 for females. The per capita income for the county was $21,731. About 6.1% of families and 8.3% of the population were below the poverty line, including 10.3% of those under age 18 and 6.3% of those age 65 or over.

==Crime==

The following table includes the number of incidents reported and the rate per 1,000 persons for each type of offense (2011).

{| class="wikitable collapsible collapsed" |- ! colspan="3" | Population and crime rates |- ! scope="row" style="text-align: left;" | Population<ref name="US-CB-B02001">U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B02001. [https://www.census.gov U.S. Census website]. Retrieved October 26, 2013.</ref> | colspan="2" | 411,620 |- ! scope="row" style="text-align: left;" | Violent crime<ref name="CA-DOJ-T11">Office of the Attorney General, Department of Justice, State of California. [http://stats.doj.ca.gov/cjsc_stats/prof09/00/11.pdf Table 11: Crimes – 2009] {{webarchive|url=https://web.archive.org/web/20131202222315/http://stats.doj.ca.gov/cjsc_stats/prof09/00/11.pdf |date=December 2, 2013 }}. Retrieved November 14, 2013.</ref> | 2,064 || 5.01 |- ! scope="row" style="text-align: left;" |   Homicide<ref name="CA-DOJ-T11"/> | 20 || 0.05 |- ! scope="row" style="text-align: left;" |   Forcible rape<ref name="CA-DOJ-T11"/> | 112 || 0.27 |- ! scope="row" style="text-align: left;" |   Robbery<ref name="CA-DOJ-T11"/> | 810 || 1.97 |- ! scope="row" style="text-align: left;" |   Aggravated assault<ref name="CA-DOJ-T11"/> | 1,122 || 2.73 |- ! scope="row" style="text-align: left;" | Property crime<ref name="CA-DOJ-T11"/> | 8,460 || 20.55 |- ! scope="row" style="text-align: left;" |   Burglary<ref name="CA-DOJ-T11"/> | 4,168 || 10.13 |- ! scope="row" style="text-align: left;" |   Larceny-theft<ref name="CA-DOJ-T11"/><ref name="LT-note" group="note">Only larceny-theft cases involving property over $400 in value are reported as property crimes.</ref> | 7,018 || 17.05 |- ! scope="row" style="text-align: left;" |   Motor vehicle theft<ref name="CA-DOJ-T11"/> | 2,084 || 5.06 |- ! scope="row" style="text-align: left;" | Arson<ref name="CA-DOJ-T11"/> | 116 || 0.28 |}

===Cities by population and crime rates===

{| class="wikitable collapsible collapsed sortable" style="width: 100%;" |- ! colspan="9" | Cities by population and crime rates |- ! City ! data-sort-type="number" | Population<ref name="FBI-UCR-T8">United States Department of Justice, Federal Bureau of Investigation. [https://www.fbi.gov/about-us/cjis/ucr/crime-in-the-u.s/2012/crime-in-the-u.s.-2012/tables/8tabledatadecpdf/table-8-state-cuts/table_8_offenses_known_to_law_enforcement_by_california_by_city_2012.xls Crime in the United States, 2012, Table 8 (California)]. Retrieved November 14, 2013.</ref> ! data-sort-type="number" | Violent crimes<ref name="FBI-UCR-T8"/> ! data-sort-type="number" | Violent crime rate per 1,000 persons ! data-sort-type="number" | Property crimes<ref name="FBI-UCR-T8"/> ! data-sort-type="number" | Property crime rate per 1,000 persons |- | Benicia || 27,459 || 37 || 1.35 || 390 || 14.20 |- | Dixon || 18,708 || 53 || 2.83 || 315 || 16.84 |- | Fairfield || 107,110 || 454 || 4.24 || 3,317 || 30.97 |- | Rio Vista || 7,485 || 39 || 5.21 || 145 || 19.37 |- | Suisun City || 28,593 || 57 || 1.99 || 558 || 19.52 |- | Vacaville || 93,951 || 246 || 2.62 || 2,031 || 21.62 |- | Vallejo || 117,912 || 878 || 7.45 || 5,844 || 49.56 |}

==Government and politics== ===Government=== {{main|Government of Solano County, California}}

The Government of Solano County is defined and authorized under the California Constitution and law as a general law county. The County government provides countywide services such as elections and voter registration, law enforcement, jails, vital records, property records, tax collection, public health, and social services. In addition the County serves as the local government for all unincorporated areas.

The County government is composed of the elected five-member Board of Supervisors, several other elected offices including the Sheriff-Coroner, District Attorney, Assessor/Recorder, Auditor-Controller, and Treasurer/Tax Collector/County Clerk, and numerous county departments and entities under the supervision of the County Administrator. As of March 2023, the members of the Solano County Board of Supervisors were:

* Cassandra James, District 1 * Monica Brown, District 2, Vice Chair * Wanda Williams, District 3 * John Vasquez, District 4 * Mitch Mashburn, District 5, Chair

===Politics===

====Voter registration statistics====

{| class="wikitable collapsible collapsed" |- ! colspan="3" | Population and registered voters |- ! scope="row" style="text-align: left;" | Total population<ref name="US-CB-B02001"/> | colspan="2" | 411,620 |- ! scope="row" style="text-align: left;" |   Registered voters<ref name="CA-SS">California Secretary of State. [http://www.sos.ca.gov/elections/ror/ror-pages/ror-odd-year-2013/political-sub.pdf February 10, 2013 - Report of Registration] {{webarchive|url=https://web.archive.org/web/20130727173649/http://www.sos.ca.gov/elections/ror/ror-pages/ror-odd-year-2013/political-sub.pdf |date=July 27, 2013 }}. Retrieved October 31, 2013.</ref><ref name="PCT-RV" group=note>Percentage of registered voters with respect to total population. Percentages of party members with respect to registered voters follow.</ref> | 210,453 | 51.1% |- ! scope="row" style="text-align: left;" |     Democratic<ref name="CA-SS"/> | 102,177 | 48.6% |- ! scope="row" style="text-align: left;" |     Republican<ref name="CA-SS"/> | 52,633 | 25.0% |- ! scope="row" style="text-align: left;" |     Democratic–Republican spread<ref name="CA-SS"/> | '''+49,544''' | '''+23.6%''' |- ! scope="row" style="text-align: left;" |     Independent<ref name="CA-SS"/> | 5,940 | 2.8% |- ! scope="row" style="text-align: left;" |     Green<ref name="CA-SS"/> | 878 | 0.4% |- ! scope="row" style="text-align: left;" |     Libertarian<ref name="CA-SS"/> | 1,123 | 0.5% |- ! scope="row" style="text-align: left;" |     Peace and Freedom<ref name="CA-SS"/> | 539 | 0.3% |- ! scope="row" style="text-align: left;" |     Americans Elect<ref name="CA-SS"/> | 12 | 0.0% |- ! scope="row" style="text-align: left;" |     Other<ref name="CA-SS"/> | 905 | 0.4% |- ! scope="row" style="text-align: left;" |     No party preference<ref name="CA-SS"/> | 46,246 | 22.0% |}

{| class="wikitable collapsible collapsed" |- ! colspan="8" | Cities by population and voter registration |- ! City ! data-sort-type="number" | Population<ref name="US-CB-B02001" /> ! data-sort-type="number" | Registered voters<ref name="CA-SS" /> <ref name="PCT-RV" group="note" /> ! data-sort-type="number" | Democratic<ref name="CA-SS" /> ! data-sort-type="number" | Republican<ref name="CA-SS" /> ! data-sort-type="number" | D–R spread<ref name="CA-SS" /> ! data-sort-type="number" | Other<ref name="CA-SS" /> ! data-sort-type="number" | No party preference<ref name="CA-SS" /> |- | Benicia || 26,981 || 68.1% || 47.2% || 25.3% || '''+21.9%''' || 8.4% || 22.1% |- | Dixon || 18,141 || 50.7% || 38.8% || 35.4% || '''+3.4%''' || 7.3% || 21.4% |- | Fairfield || 104,404 || 48.1% || 48.7% || 24.4% || '''+24.3%''' || 6.8% || 22.7% |- | Rio Vista || 7,088 || 72.6% || 42.7% || 33.9% || '''+8.8%''' || 9.0% || 18.2% |- | Suisun City || 27,900 || 49.1% || 52.4% || 20.2% || '''+32.2%''' || 7.0% || 23.2% |- | Vacaville || 92,217 || 50.1% || 39.6% || 33.2% || '''+6.4%''' || 8.5% || 22.1% |- | Vallejo || 116,021 || 48.8% || 59.9% || 14.5% || '''+45.4%''' || 6.1% || 21.8% |}

====Overview==== thumb|Solano County courthouse tower in parking lot Solano County has been a Democratic stronghold in presidential and congressional elections, with Californians Richard Nixon (in 1972) and Ronald Reagan (in 1980 and 1984) being the only Republicans to win the county since 1928. However, the northern area of Solano County including Vacaville and Dixon have begun shifting right as evidenced by the 2022 midterms, voters in Congressional District 4 favoring the Republican candidate 50.3% to 49.7%.<ref>{{cite web | url=https://www.solanocounty.com/depts/rov/November_8_2022_Election_Results/election_results.asp | title=Solano County - NOVEMBER 8, 2022 - Election Results }}</ref>

{{PresHead|place=Solano County, California|source1=<ref>{{Cite web|url=http://uselectionatlas.org/RESULTS/|title=Dave Leip's Atlas of U.S. Presidential Elections|last=Leip|first=David|website=uselectionatlas.org|access-date=September 5, 2018}}</ref><ref>{{Cite news|url=https://elections.cdn.sos.ca.gov/sov/2008-general/17_22_pres_by_county.pdf |archive-url=https://web.archive.org/web/20250425081311/https://elections.cdn.sos.ca.gov/sov/2008-general/17_22_pres_by_county.pdf |archive-date=2025-04-25 |url-status=live|title=United States President by County|last=Bowen|first=Debra|author-link=Debra Bowen|date=December 13, 2008|work=Secretary of State of California|access-date=October 3, 2025}}</ref><ref>{{Cite news|url=https://elections.cdn.sos.ca.gov/sov/2012-general/10-president.pdf |archive-url=https://web.archive.org/web/20250324192251/https://elections.cdn.sos.ca.gov/sov/2012-general/10-president.pdf |archive-date=2025-03-24 |url-status=live|title=President by County|last=Bowen|first=Debra|author-link=Debra Bowen|date=December 14, 2012|work=Secretary of State of California|access-date=October 3, 2025}}</ref><ref>{{Cite news|url=https://elections.cdn.sos.ca.gov/sov/2016-general/sov/17-presidential-formatted.pdf |archive-url=https://web.archive.org/web/20250831051712/https://elections.cdn.sos.ca.gov/sov/2016-general/sov/17-presidential-formatted.pdf |archive-date=2025-08-31 |url-status=live|title=President by County|last=Padilla|first=Alex|author-link=Alex Padilla|date=December 16, 2016|work=Secretary of State of California|access-date=October 3, 2025}}</ref><ref>{{Cite news|url=https://elections.cdn.sos.ca.gov/sov/2020-general/sov/18-presidential.pdf |archive-url=https://web.archive.org/web/20250614002159/https://elections.cdn.sos.ca.gov/sov/2020-general/sov/18-presidential.pdf |archive-date=2025-06-14 |url-status=live|title=President by County|last=Padilla|first=Alex|author-link=Alex Padilla|date=December 11, 2020|work=Secretary of State of California|access-date=October 3, 2025}}</ref><ref>{{Cite news|url=https://elections.cdn.sos.ca.gov/sov/2024-general/sov/16-president.pdf |archive-url=https://web.archive.org/web/20241217210354/https://elections.cdn.sos.ca.gov/sov/2024-general/sov/16-president.pdf |archive-date=2024-12-17 |url-status=live|title=President by County|last=Weber|first=Shirley|author-link=Shirley Weber|date=December 13, 2024|work=Secretary of State of California|access-date=October 1, 2025}}</ref>|source2=<ref group=note>This total comprised 3,353 votes for Progressive Theodore Roosevelt (who was official Republican nominee in California), 781 votes for Socialist Eugene V. Debs and 169 votes for Prohibition Party nominee Eugene W. Chafin.</ref>}}  {{PresRow|1880|Republican|1,963|1,959|20|California}} {{PresRow|1884|Republican|2,382|1,977|84|California}} {{PresRow|1888|Republican|2,231|2,158|103|California}} {{PresRow|1892|Republican|2,403|2,174|306|California}} {{PresRow|1896|Republican|2,702|2,284|94|California}} {{PresRow|1900|Republican|3,114|2,262|249|California}} {{PresRow|1904|Republican|3,176|1,555|444|California}} {{PresRow|1908|Republican|3,115|2,033|545|California}} {{PresRow|1912|Democratic|40|3,650|4,303|California}} {{PresRow|1916|Democratic|3,536|5,678|514|California}} {{PresRow|1920|Republican|7,102|2,954|909|California}} {{PresRow|1924|Republican|4,782|957|4,223|California}} {{PresRow|1928|Republican|7,061|6,278|158|California}} {{PresRow|1932|Democratic|4,382|9,712|367|California}} {{PresRow|1936|Democratic|3,603|13,459|182|California}} {{PresRow|1940|Democratic|6,081|15,054|193|California}} {{PresRow|1944|Democratic|10,361|24,335|105|California}} {{PresRow|1948|Democratic|12,345|23,257|1,022|California}} {{PresRow|1952|Democratic|19,369|26,130|216|California}} {{PresRow|1956|Democratic|17,865|24,903|95|California}} {{PresRow|1960|Democratic|18,751|26,977|141|California}} {{PresRow|1964|Democratic|15,263|34,930|47|California}} {{PresRow|1968|Democratic|17,683|27,271|5,998|California}} {{PresRow|1972|Republican|31,314|24,766|1,885|California}} {{PresRow|1976|Democratic|26,136|33,682|1,826|California}} {{PresRow|1980|Republican|40,919|30,952|8,805|California}} {{PresRow|1984|Republican|51,678|41,982|1,138|California}} {{PresRow|1988|Democratic|50,314|54,344|1,430|California}} {{PresRow|1992|Democratic|38,883|64,320|28,908|California}} {{PresRow|1996|Democratic|40,742|64,644|11,893|California}} {{PresRow|2000|Democratic|51,604|75,116|5,015|California}} {{PresRow|2004|Democratic|62,301|85,096|1,440|California}} {{PresRow|2008|Democratic|56,035|102,095|2,843|California}} {{PresRow|2012|Democratic|52,092|96,783|3,569|California}} {{PresRow|2016|Democratic|51,920|102,360|11,833|California}} {{PresRow|2020|Democratic|69,306|131,639|4,932|California}} {{PresRow|2024|Democratic|70,345|113,997|5,541|California}} {{PresFoot}}

Solano County is split between California's 4th, 7th and 8th congressional districts, represented by {{Representative|cacd|4}}, {{Representative|cacd|7}} and {{Representative|cacd|8}} respectively.<ref>{{Cite GovTrack|CA|3|access-date=March 1, 2013}}</ref>

In the California State Assembly, Solano County is split between {{Representative|caad|4|fmt=adistrict}}, and {{Representative|caad|11|fmt=adistrict}}. In the California State Senate, it is in {{Representative|casd|3|fmt=sdistrict}}.<ref>{{Cite web | url = http://statewidedatabase.org/gis/gis2011/index_2011.html | title = Statewide Database | publisher = UC Regents | access-date = December 4, 2014 | archive-url = https://web.archive.org/web/20150201113744/http://statewidedatabase.org/gis/gis2011/index_2011.html | archive-date = February 1, 2015 | url-status = dead }}</ref>

On November 4, 2008, Solano County voted 55.82% in favor of Proposition 8, which amended the California Constitution to ban same-sex marriages. It was the only Bay Area county to approve the initiative.<ref>{{cite web|url=https://elections.cdn.sos.ca.gov/sov/2008-general/ssov/10-ballot-measures-statewide-summary-by-county.pdf|title=Supplement to the Statement of Vote Statewide Summary by County for State Ballot Measures|publisher=California Secretary of State|page=52|access-date=July 1, 2019}}</ref> In the 2008 presidential election that day, Barack Obama carried the county by a 28.5% margin over John McCain, a larger margin than statewide (24%).<ref>{{cite web|last1=Leip|first1=David|title=Dave Leip's Atlas of U.S. Presidential Elections|url=http://www.uselectionatlas.org/RESULTS/|website=www.uselectionatlas.org|access-date=October 2, 2016}}</ref>

According to the California Secretary of State, as of February 10, 2019, Solano County has 236,028 registered voters. Of those, 106,452 (45.1%) are registered Democrats, 50,006 (21.2%) are registered Republicans, and 66,558 (28.2%) have declined to state a political party.<ref>[https://elections.cdn.sos.ca.gov/ror/ror-odd-year-2019/politicalsub.pdf CA Secretary of State – Report of Registration – February 10, 2019] {{webarchive|url=https://web.archive.org/web/20190323230212/https://elections.cdn.sos.ca.gov/ror/ror-odd-year-2019/politicalsub.pdf|date= March 23, 2019 }}</ref> Democrats hold voter-registration advantages in all incorporated cities and towns in Solano County. However, Republicans lead in registration in the unincorporated communities of the county (40%-35%), making Solano the only county in the Bay Area where Republicans out-number Democrats in unincorporated communities. The Democrats' largest registration advantage in Solano is in the city of Vallejo, wherein there are only 8,242 Republicans (14.6%) out of 56,313 total voters compared to 33,753 Democrats (59.9%) and 12,157 voters who have declined to state a political party (21.6%).

==Communities==

===Cities=== {{div col}} *Benicia *Dixon *Fairfield (county seat) *Rio Vista *Suisun City *Vacaville *Vallejo {{div col end}}

<gallery widths="200px" heights="200px"> File:People line up at the gate to the Solano County Fair in Vallejo, California.jpg|People line up at the gate to the Solano County Fair in Vallejo. File:A building on the Solano County Fairgrounds.jpg|A building on the Solano County Fairgrounds </gallery>

===Census-designated places=== *Allendale *Elmira *Green Valley *Hartley

===Other unincorporated communities=== {{div col}} *Bahia *Batavia *Birds Landing *Bucktown *Collinsville *Cordelia *Denverton *Maine Prairie *Mankas Corner *Rockville *Scandia {{div col end}}

===Population ranking=== The population ranking of the following table is based on the 2020 census of Solano County.<ref>{{cite web |title=Explore Census Data |url=https://data.census.gov/cedsci/ |website=United States Census Bureau |access-date=November 28, 2021}}</ref>

'''†''' ''county seat''

{| class="wikitable sortable" |- !Rank !Settlement !Municipal type !Population (2020 census)

|- style="background-color:#FFFACD;" | 1 |'''Vallejo''' | City | 126,090 |- style="background-color:#FFFACD;" | 2 |'''†''' '''Fairfield''' | City | 119,881 |- style="background-color:#FFFACD;" | 3 |'''Vacaville''' | City | 102,386 |- style="background-color:#FFFACD;" | 4 |'''Suisun City''' | City | 29,518 |- style="background-color:#FFFACD;" | 5 |'''Benicia''' | City | 27,131 |- style="background-color:#FFFACD;" | 6 |'''Dixon''' | City | 18,988 |- style="background-color:#FFFACD;" | 7 |'''Rio Vista''' | City | 10,005 |- style="background-color:#F0FFF0;" | 8 |'''Hartley''' | CDP | 2,430 |- style="background-color:#F0FFF0;" | 9 |'''Green Valley''' | CDP | 1,654 |- style="background-color:#F0FFF0;" | 10 |'''Allendale''' | CDP | 1,651 |- style="background-color:#F0FFF0;" | 11 |'''Elmira''' | CDP | 193 |}

==Education== A portion of the South Campus at the University of California, Davis, is in Solano County.

School districts include:<ref>{{cite map|author=Geography Division|url=https://www2.census.gov/geo/maps/DC2020/PL20/st06_ca/schooldistrict_maps/c06095_solano/DC20SD_C06095.pdf|title=2020 Census - School District Reference Map: Solano County, CA|publisher=U.S. Census Bureau|place=Suitland, Maryland|date=December 18, 2020|access-date=2025-12-04}} - [https://www2.census.gov/geo/maps/DC2020/PL20/st06_ca/schooldistrict_maps/c06095_solano/DC20SD_C06095_SD2MS.txt Text list]</ref> {{div col}} * Benicia Unified School District * Davis Joint Unified School District * Dixon Unified School District * Fairfield-Suisun Unified School District * River Delta Joint Unified School District * Travis Unified School District * Vacaville Unified School District * Vallejo City Unified School District * Winters Joint Unified School District {{div col end}}

==Miscellania== {{Unreferenced section|date=July 2018}} * In 1985 Humphrey the humpback whale strayed off his migration route and ended up in Shag Slough north of Rio Vista. Rescuers from the Marine Mammal Center and other volunteers dismantled a county bridge before being able to turn him around in the narrow slough. <ref>{{Cite web |date=2018-05-19 |title=FROM THE ARCHIVE: Humphrey the whale leaps into hearts of Bay Area residents in 1985 |url=https://abc7news.com/post/humphrey-the-lost-whale-san-francisco-bay-carquinez-strait-archive-video/3492858/ |access-date=2026-04-23 |website=ABC7 San Francisco |language=en}}</ref>

==Explanatory notes== {{reflist|group=note}}

==References== {{Reflist}}

==External links== {{Commons category}} * {{Official website|http://www.solanocounty.com}} * {{cite book|url=https://archive.org/details/historyofsolanoc01munr|first=J. P.|last=Munro-Fraser|title=History of Solano County|publisher=Wood, Alley & Co|location=San Francisco, California|year=1879}} An early history of Solano County. * [https://localwiki.org/vacaville/Hiking Hiking trails in Solano County]

{{Geographic Location | Centre = Solano County, California | North = Yolo County | Northeast = | East = Sacramento County | Southeast = | South = Contra Costa County | Southwest = | West = Sonoma County and Napa County | Northwest = }} {{Solano County, California}} {{North Bay}} {{SF Bay Area}} {{California}} {{Authority control}}

Category:Solano County, California Category:Counties in the San Francisco Bay Area Category:California counties Category:1850 establishments in California Category:Populated places in the United States established in 1850 Category:Majority-minority counties in California