{{short description|County in Oklahoma, United States}} {{Distinguish|Delaware, Oklahoma}} {{Use American English|date=June 2025}} {{Use mdy dates|date=April 2024}} {{Infobox U.S. county | county = Delaware County | state = Oklahoma | seal = | founded year = 1907 | founded date = | seat wl = Jay | largest city wl = Grove | area_total_sq_mi = 792 | area_land_sq_mi = 738 | area_water_sq_mi = 54 | area percentage = 6.8% | population_as_of = 2020 | population_total = 40397 | census estimate yr = | pop_est_as_of = 2025 | population_est = 41910 {{increase}} | density_sq_mi = auto | time zone = Central | web = https://delaware.okcounties.org/ | named for = Delaware Indians | ex image = Delaware courthouse facade.jpg | ex image cap = Delaware County Courthouse | district = 2nd }}
'''Delaware County''' is a county located in the U.S. state of Oklahoma. As of the 2020 census, its population was 40,397.<ref name=":0">{{cite web|title=Delaware County, Oklahoma|url=https://data.census.gov/profile/Delaware_County,_Oklahoma?g=050XX00US40041|publisher=United States Census Bureau|access-date=May 11, 2023}}</ref> Its county seat is Jay.<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 |url-status=dead |archive-url=https://web.archive.org/web/20110531210815/http://www.naco.org/Counties/Pages/FindACounty.aspx |archive-date=May 31, 2011 }}</ref> The county was named for the Delaware Indians, who had established a village in the area prior to the Cherokees being assigned to relocate to Indian Territory in the 1830s. Delaware County was created in 1907. Prior to becoming Delaware County, a large portion of the area was known as the Delaware District of the Cherokee Nation. Today, Delaware County continues to be recognized by the Cherokee Nation as the Delaware District.
==History== Archaeological studies have shown that at least three different periods of prehistoric people had lived in the area covered by Delaware County. These included 23 Archaic, 17 Woodland, and 63 Eastern Villager sites. Artifacts date back between 1400 and 2000 years from the present. Many of these sites have been submerged since the creation of Grand Lake o' the Cherokees.<ref name="EOHC-DelCo">Stauber, Rose. [http://www.okhistory.org/publications/enc/entry.php?entry=DE010 "Delaware County,"] ''Encyclopedia of Oklahoma History and Culture'', 2009. Accessed March 25, 2015.</ref>
Few Native Americans lived in the area until the early 19th century, when the federal government began relocating tribes from the Eastern United States. About 1820, a group of Delaware, who had allied with the Cherokee against the Osage, settled Delaware Town, about two miles south of the present town of Eucha. In 1828, the Western Cherokee moved from Arkansas Territory into the area just south of the present Delaware County. In 1832, the Seneca moved from Ohio into an area that included the northeastern part of Delaware County.<ref name="EOHC-DelCo"/>
The present-day county was created at statehood in 1907. Initially, Grove, the only incorporated town in the county, was designated as the county seat. However, a large number of county residents wanted a more centrally located seat. This group founded the town of Jay, where they built a wooden courthouse and won an election to move the county seat. A court suit resolved the dispute in favor of the Jay location.<ref name="EOHC-DelCo"/>
==Geography== According to the U.S. Census Bureau, the county has a total area of {{convert|792|sqmi}}, of which {{convert|54|sqmi}} (6.8%) are covered by water.<ref name="GR1">{{cite web|url=http://www2.census.gov/geo/docs/maps-data/data/gazetteer/counties_list_40.txt|publisher=United States Census Bureau|access-date=February 19, 2015|date=August 22, 2012|title=2010 Census Gazetteer Files}}</ref> The county lies on the western slope of the Ozark Plateau; no oil, gas, or mineral resources of economic consequence are present, but the county has abundant water.<ref name="EOHC-DelCo"/>
Lake Eucha, a man-made reservoir on Spavinaw Creek, completed in 1952, lies primarily within Delaware County. Grand Lake o' the Cherokees, completed in 1940, and Lake Spavinaw, completed in 1924, are partly within Delaware County. The Neosho River and the Elk River drain the northern part of the county, while Flint Creek and the Illinois River drain the southern part.<ref name="EOHC-DelCo"/>
===Major highways=== * 20px U.S. Highway 59 * 20px U.S. Highway 60 * 23px U.S. Highway 412 * 20px State Highway 10 * 20px State Highway 20 * 20px State Highway 25 * 20px State Highway 28
===Adjacent counties=== * Ottawa County (north) * McDonald County, Missouri northeast) * Benton County, Arkansas (east) * Adair County (south) * Cherokee County (south) * Mayes County (west) * Craig County (northwest)
==Demographics== {{US Census population |1910= 11469 |1920= 13868 |1930= 15370 |1940= 18592 |1950= 14734 |1960= 13198 |1970= 17767 |1980= 23946 |1990= 28070 |2000= 37077 |2010= 41487 |2020= 40397 |estyear=2025 |estimate=41910 |estref=<ref name="USCensusEst2025">{{cite web|url=https://www.census.gov/data/tables/time-series/demo/popest/2020s-counties-total.html|title=County Population Totals and Components of Change: 2020-2025|publisher=United States Census Bureau|access-date=April 16, 2026}}</ref> {{increase}} |align-fn=center |footnote=U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/prod/www/decennial.html|title=U.S. Decennial Census|publisher=United States Census Bureau|access-date=February 19, 2015|url-status=dead|archive-url=https://web.archive.org/web/20150426102944/http://www.census.gov/prod/www/decennial.html|archive-date=April 26, 2015}}</ref><br />1790-1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=February 19, 2015}}</ref> 1900-1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/ok190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|editor-last=Forstall|editor-first=Richard L.|date=March 27, 1995|access-date=February 19, 2015}}</ref><br />1990-2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-url=https://web.archive.org/web/20100327165705/http://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-date=March 27, 2010 |url-status=live|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|date=April 2, 2001|access-date=February 19, 2015}}</ref> 2010<ref name="QF">{{cite web|title=State & County QuickFacts|url=http://quickfacts.census.gov/qfd/states/40/40041.html|publisher=United States Census Bureau|access-date=November 9, 2013|url-status=dead|archive-url=https://web.archive.org/web/20110606154536/http://quickfacts.census.gov/qfd/states/40/40041.html|archive-date=June 6, 2011}}</ref> }}
===2020 census=== As of the 2020 United States census, the county had a population of 40,397. Of the residents, 20.0% were under the age of 18 and 25.6% were 65 years of age or older; the median age was 48.0 years. For every 100 females there were 97.4 males, and for every 100 females age 18 and over there were 95.9 males.<ref name=\"Census2020DP\">{{cite web|title=2020 Decennial Census Demographic Profile (DP1)|url=https://api.census.gov/data/2020/dec/dp?get=NAME%2CDP1_0021P%2CDP1_0024P%2CDP1_0025C%2CDP1_0049C%2CDP1_0045C%2CDP1_0069C%2CDP1_0073C%2CDP1_0125P%2CDP1_0126P%2CDP1_0129P%2CDP1_0138P%2CDP1_0139P%2CDP1_0141P%2CDP1_0142P%2CDP1_0143P%2CDP1_0145P%2CDP1_0146P%2CDP1_0147C%2CDP1_0148C%2CDP1_0149C%2CDP1_0156C%2CDP1_0157C%2CDP1_0158C%2CDP1_0159P%2CDP1_0160P&for=county%3A041&in=state%3A40|website=United States Census Bureau|year=2021|access-date=2025-11-23|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%2CP1_001N%2CP1_003N%2CP1_004N%2CP1_005N%2CP1_006N%2CP1_008N%2CP1_009N%2CP2_001N%2CP2_002N%2CH1_001N%2CH1_002N&for=county%3A041&in=state%3A40|website=United States Census Bureau|year=2021|access-date=2025-11-23|df=mdy}}</ref>
The racial makeup of the county was 62.9% White, 0.3% Black or African American, 21.5% American Indian and Alaska Native, 1.2% Asian, 1.5% from some other race, and 12.5% from two or more races. Hispanic or Latino residents of any race comprised 4.0% of the population.<ref name=\"Census2020PL\"/>
There were 16,677 households in the county, of which 25.0% had children under the age of 18 living with them and 24.5% had a female householder with no spouse or partner present. About 28.2% of all households were made up of individuals and 14.5% had someone living alone who was 65 years of age or older.<ref name=\"Census2020DP\"/>
There were 24,086 housing units, of which 30.8% were vacant. Among occupied housing units, 75.5% were owner-occupied and 24.5% were renter-occupied. The homeowner vacancy rate was 3.0% and the rental vacancy rate was 9.4%.<ref name=\"Census2020DP\"/>
===2010 census=== As of the 2010 census, 41,487 people resided in the county, up from 37,077 people in 2000. Of the 14,838 households, 29.0% had children under living with them, 59.5% were married couples living together, 8.9 had a female householder with no husband present, and 27.4% were not families. About 24.0% of all households were made up of individuals, and 11.2% had someone living alone who was 65 or older. The average household size was 2.46 and the average family size was 2.89. In the county, the age distribution was 24.5% under 18, 6.90% from 18 to 24, 24.40% from 25 to 44, 26.70% from 45 to 64, and 17.50% who were 65 or older. The median age was 41 years. For every 100 females there were 96.50 males. For every 100 females 18 and over, there were 93.80 males.
As of 2010, the median income for a household in the county was $27,996, and the median income for a family was $33,093. Males had a median income of $25,758 versus $19,345 for females. The per capita income for the county was $15,424. About 14.10% of families and 18.30% of the population were below the poverty line, including 27.40% of those under age 18 and 11.60% of those age 65 or over.
===2000 census=== In the 2000 census, 14,838 households and 10,772 families resided in the county. The population density was {{convert|50|/mi2|/km2|disp=preunit|people |people|}}. The 22,290 housing units had an average density of {{convert|30|/mi2|/km2|adj=pre|units }}. The racial makeup of the county was 70.22% White, 0.13% African American, 22.31% Native American, 0.17% Asian, 0.63% from other races, and 6.53% from two or more races. Self-identified Hispanics or Latinos made up 1.75% of the population. About 93.8% spoke English, 3.5% Cherokee, and 2.3% Spanish as their first language.
==Politics== {| class=wikitable ! colspan = 6 | Voter Registration and Party Enrollment as of June 30, 2023<ref>{{cite web|url=https://www.ok.gov/elections/documents/20190115%20-%20Registration%20By%20County%20(vr2420).pdf|title=Oklahoma Registration Statistics by County|date=January 15, 2019|website=OK.gov|access-date=February 27, 2019|archive-date=July 17, 2020|archive-url=https://web.archive.org/web/20200717212721/https://www.ok.gov/elections/documents/20190115%20-%20Registration%20By%20County%20(vr2420).pdf|url-status=dead}}</ref> |- ! colspan = 2 | Party ! Number of Voters ! Percentage |- | {{party color cell|Democratic Party (United States)}} | Democratic | align = center | 5,872 | align = center | 22.79% |- | {{party color cell|Republican Party (United States)}} | Republican | align = center | 15,725 | align = center | 61.03% |- | {{party color cell|Independent Party (United States)}} | Others | align = center | 4,169 | align = center | 16.18% |- ! colspan = 2 | Total ! align = center | 25,766 ! align = center | 100% |}
{{PresHead|place=Delaware County, Oklahoma|source=<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=February 20, 2021}}</ref>}} <!-- PresRow should be {{PresRow|Year|Winning party|GOP vote #|Dem vote #|3rd party vote #|State}} --> {{PresRow|1908|Democratic|625|974|54|Oklahoma}} {{PresRow|1912|Democratic|732|983|184|Oklahoma}} {{PresRow|1916|Democratic|837|1,227|233|Oklahoma}} {{PresRow|1920|Republican|2,059|1,282|139|Oklahoma}} {{PresRow|1924|Democratic|1,563|1,729|263|Oklahoma}} {{PresRow|1928|Republican|2,603|1,706|51|Oklahoma}} {{PresRow|1932|Democratic|1,469|3,684|0|Oklahoma}} {{PresRow|1936|Democratic|2,632|3,398|15|Oklahoma}} {{PresRow|1940|Democratic|3,305|3,417|17|Oklahoma}} {{PresRow|1944|Republican|2,660|2,373|93|Oklahoma}} {{PresRow|1948|Democratic|2,343|3,157|0|Oklahoma}} {{PresRow|1952|Republican|3,399|2,686|0|Oklahoma}} {{PresRow|1956|Republican|3,078|2,679|0|Oklahoma}} {{PresRow|1960|Republican|3,639|2,282|0|Oklahoma}} {{PresRow|1964|Democratic|2,743|3,702|0|Oklahoma}} {{PresRow|1968|Republican|3,168|2,129|1,402|Oklahoma}} {{PresRow|1972|Republican|5,476|2,135|178|Oklahoma}} {{PresRow|1976|Democratic|3,642|4,924|91|Oklahoma}} {{PresRow|1980|Republican|5,302|4,244|273|Oklahoma}} {{PresRow|1984|Republican|6,690|3,789|63|Oklahoma}} {{PresRow|1988|Republican|5,248|4,889|75|Oklahoma}} {{PresRow|1992|Democratic|4,840|4,842|2,744|Oklahoma}} {{PresRow|1996|Republican|5,230|5,094|1,615|Oklahoma}} {{PresRow|2000|Republican|7,618|5,514|221|Oklahoma}} {{PresRow|2004|Republican|10,017|5,591|0|Oklahoma}} {{PresRow|2008|Republican|10,277|5,085|0|Oklahoma}} {{PresRow|2012|Republican|10,080|4,196|0|Oklahoma}} {{PresRow|2016|Republican|11,826|3,311|579|Oklahoma}} {{PresRow|2020|Republican|13,557|3,472|216|Oklahoma}} {{PresRow|2024|Republican|14,407|3,475|226|Oklahoma}} {{PresFoot}}
==Communities== ===Cities=== * Grove * Jay
===Towns=== * Bernice * Colcord * Kansas * Oaks * West Siloam Springs
===Census-designated places=== {{div col|colwidth=15em}} * Brush Creek * Bull Hollow * Butler * Cayuga * Cleora * Cloud Creek * Copeland * Deer Lick * Dennis * Dodge * Dripping Springs * Drowning Creek * Flint Creek * Indianola * Kenwood * Leach * New Eucha * Oak Hill-Piney * Old Eucha * Rocky Ford * Sycamore * Tagg Flats * Twin Oaks * White Water * Zena {{div col end}}
===Other unincorporated communities=== * Chloeta * Eucha
==NRHP sites== Delaware County, together with Ottawa County to the north, has a large impact on tourism in Oklahoma. Said counties combined are the third-largest tourism destination in the state, following only the Oklahoma City and Tulsa metropolitan areas.<ref>{{cite web|url=https://www.tulsaworld.com/news/state-and-regional/ottawa-delaware-counties-generates-million-combined-in-visitor-spending-as/article_633b0aa0-fe66-5d7e-92bd-ea43785a864e.html |title=Ottawa, Delaware counties generates $519 million combined in visitor spending as 'welcome mat' for Oklahoma|publisher=Kaylea M. Hutson-Miller, Tulsa World, October 19, 2019|access-date=October 19, 2019}}</ref> {{Main|National Register of Historic Places listings in Delaware County, Oklahoma}}
These sites are in Delaware County are listed on the National Register of Historic Places: * Bassett Grove Ceremonial Grounds, Grove * Beattie's Prairie, Jay * Corey House/Hotel, Grove * Hildebrand Mill, Siloam Springs * Polson Cemetery, Jay * Saline Courthouse, Rose * Splitlog Church, Grove
==Education== Kindergarten-grade 12 school districts include:<ref name=SDMap2020>{{cite map|author=Geography Division|url=https://www2.census.gov/geo/maps/DC2020/PL20/st40_ok/schooldistrict_maps/c40041_delaware/DC20SD_C40041.pdf|title=2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Delaware County, OK|publisher=U.S. Census Bureau|access-date=2025-04-04}} - [https://www2.census.gov/geo/maps/DC2020/PL20/st40_ok/schooldistrict_maps/c40041_delaware/DC20SD_C40041_SD2MS.txt Text list]</ref> {{div col|colwidth=30em}} * Afton Public Schools * Colcord Public Schools * Grove Public Schools * Jay Public Schools * Kansas Public Schools * Ketchum Public Schools * Oaks-Mission Public Schools * Westville Public Schools {{div col end}}
Elementary school districts include:<ref name=SDMap2020/> {{div col|colwidth=30em}} * Cleora Public School * Kenwood Public School * Leach Public School * Moseley Public School * Turkey Ford Public School {{div col end}}
==References== {{reflist}}
==External links== * [http://www.okhistory.org/publications/enc/entry.php?entry=DE010 Encyclopedia of Oklahoma History and Culture - Delaware County] * [https://web.archive.org/web/20121024013411/http://www.library.okstate.edu/okmaps/ Oklahoma Digital Maps: Digital Collections of Oklahoma and Indian Territory]
{{Geographic location |Centre = Delaware County |North = Ottawa County |Northeast = McDonald County, Missouri |East = Benton County, Arkansas |Southeast = |South = Adair County and<br />Cherokee County |Southwest = |West = Mayes County |Northwest = Craig County }}
{{Delaware County, Oklahoma}} {{Oklahoma}}
{{coord|36.41|-94.80|display=title|type:adm2nd_region:US-OK_source:UScensus1990}}
{{authority control}}
Category:Delaware County, Oklahoma Category:1907 establishments in Oklahoma Category:Populated places in the United States established in 1907