| State | California |
|---|---|
| County | Sierra |
| Unit pref | Imperial |
| Area total | 0.35 sq mi |
| Area land | 0.35 sq mi |
| Area water | 0.00 sq mi |
| Area total | 0.90 km² |
| Area land | 0.90 km² |
| Area water | 0.00 km² |
| Area water percent | 0 |
| Population as of | 2020 |
| Population total | 30 |
| Population density | 33.17 km² |
| Time zone | Pacific (PST) (UTC-8) |
| Time zone (DST) | PDT (UTC-7) |
| Elevation | 4229 ft |
| Coordinates | 39°28′00″N 120°50′28″W |
| FIPS code | 06-00982 |
| GNIS feature ID | 2582931 |
| Population density | 85.96 sq mi |
Alleghany is a small census-designated place in Sierra County, California, United States[1] in the Sierra Nevada. It is situated in the Gold Country and continues to be a significant locale for gold mining. The Sixteen To One Mine has been in operation since the days of the California Gold Rush. The town is 20 miles (32 km) from the nearest highway (California State Route 49) and consists largely of a single main street. The town is home to a post office, a bar, and a mining museum. The population was 30 at the 2020 census.
The community was named in 1859 for the Alleghany Tunnel mine that fueled the growth of the town when it struck gold four years earlier. The mine itself was named for the Allegheny River.[2]
Geography
According to the United States Census Bureau, the CDP covers an area of 0.3 square mile (0.9 km2), all land.
Demographics
2020 census
As of the 2020 census, Alleghany had a population of 30. The population density was 86.0 inhabitants per square mile (33.2 /km2). The median age was 54.5 years. 10.0% of residents were under the age of 18, 70% were aged 18 to 64, and 20.0% of residents were 65 years of age or older. For every 100 females there were 172.7 males, and for every 100 females age 18 and over there were 200.0 males age 18 and over.[3][4]
0.0% of residents lived in urban areas, while 100.0% lived in rural areas.[5]
There were 16 households in Alleghany, of which 31.3% had children under the age of 18 living in them. The average household size was 1.88. There were 10 families (63% of all households). Of all households, 50.0% were married-couple households, 31.3% were households with a male householder and no spouse or partner present, and 6.3% were households with a female householder and no spouse or partner present. About 25.1% of all households were made up of individuals and 12.5% had someone living alone who was 65 years of age or older.[3][6]
There were 25 housing units at an average density of 71.6 /mi2, of which 36.0% were vacant. The homeowner vacancy rate was 0.0% and the rental vacancy rate was 0.0%. Of occupied housing units, 56% were owner-occupied and 44% were occupied by renters.[3][7]
| Race | Number | Percent |
|---|---|---|
| White | 23 | 76.7% |
| Black or African American | 0 | 0.0% |
| American Indian and Alaska Native | 0 | 0.0% |
| Asian | 0 | 0.0% |
| Native Hawaiian and Other Pacific Islander | 0 | 0.0% |
| Some other race | 2 | 6.7% |
| Two or more races | 5 | 16.7% |
| Hispanic or Latino (of any race) | 2 | 6.7% |
2010 census
Alleghany first appeared as a census designated place in the 2010 U.S. census.[8]
Politics
In the state legislature, Alleghany is in ,[9] and .[10]
Federally, Alleghany is in .[11]
Notable people
- Robert D. Walsh, U.S. Army brigadier general[12][13]
References
- ^
- ^ Gudde, Erwin & William Bright (2004). California Place Names. Fourth ed. University of California Press. p. 9. ISBN 0-520-24217-3.
- ^ "2020 Decennial Census Demographic Profile (DP1)". United States Census Bureau. 2021. Retrieved April 26, 2026.
- ^ "2020 Decennial Census Redistricting Data (Public Law 94-171)". United States Census Bureau. 2021. Retrieved April 26, 2026.
- ^ "2020 Decennial Census Demographic and Housing Characteristics (DHC)". United States Census Bureau. 2023. Retrieved April 26, 2026.
- ^ "Alleghany CDP, California; P16: Household Type - 2020 Census of Population and Housing". US Census Bureau. Retrieved March 31, 2025.
- ^ "Alleghany CDP, California; DP1: Profile of General Population and Housing Characteristics - 2020 Census of Population and Housing". US Census Bureau. Retrieved March 31, 2025.
- ^ "2010 Census of Population - Population and Housing Unit Counts - California". United States Census Bureau
- ^ "Senators". State of California. Retrieved March 10, 2013.
- ^ "Members Assembly". State of California. Retrieved March 2, 2013.
- ^ Retrieved May 9, 2025.
- ^ "1870 United States Federal Census, Entry for Michael Walsh Family". Ancestry.com. Lehi, UT: Ancestry.com, LLC. July 12, 1870. Retrieved November 26, 2023.
- ^ Cloud, Ray W. (December 7, 1951). "Improvements Came Fast In 1860s as Redwood City Began to Take Shape". Redwood City Tribune. p. 18A. – via Newspapers.com
Further reading
- History of Sierra County, by James J. Sinnott, vol.3: Alleghany and Forest City: Treasure Towns, published by California Traveler, Volcano, California, 1975.
- Lode Deposits of the Alleghany District, California by Henry G. Ferguson, United States Geological Survey Bulletin #580, 1914.
- Gold Quartz Veins of the Alleghany District, California, by HG Ferguson and RW Gannett, US Geological Survey Professional Paper #172, 1932.