|— census-designated place —|
|• Total||0.349 sq mi (0.904 km2)|
|• Land||0.349 sq mi (0.904 km2)|
|• Water||0 sq mi (0 km2) 0%|
|Elevation||4,229 ft (1,289 m)|
|• Density||170/sq mi ( 64/km2)|
|Time zone||Pacific (PST) (UTC-8)|
|• Summer (DST)||PDT (UTC-7)|
|GNIS feature ID||2582931|
|U.S. Geological Survey Geographic Names Information System: Alleghany, California|
Alleghany is a small census-designated place in Sierra County, California, United States in the Sierra Nevada mountains. It is situated in the Gold Country and continues to be a significant locale for gold mining. The famous 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 (Casey's Place), and a mining museum. The population was 58 at the 2010 census.
According to the United States Census Bureau, the CDP covers an area of 0.3 square miles (0.9 km²), all of it land.
The 2010 United States Census reported that Alleghany had a population of 58. The population density was 166.2 people per square mile (64.2/km²). The racial makeup of Alleghany was 58 (100.0%) White. Hispanic or Latino of any race were 1 persons (1.7%).
The Census reported that 58 people (100% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.
There were 27 households, out of which 5 (18.5%) had children under the age of 18 living in them, 12 (44.4%) were opposite-sex married couples living together, 3 (11.1%) had a female householder with no husband present, 2 (7.4%) had a male householder with no wife present. There were 5 (18.5%) unmarried opposite-sex partnerships, and 0 (0%) same-sex married couples or partnerships. 5 households (18.5%) were made up of individuals and 1 (3.7%) had someone living alone who was 65 years of age or older. The average household size was 2.15. There were 17 families (63.0% of all households); the average family size was 2.35.
The population was spread out with 8 people (13.8%) under the age of 18, 2 people (3.4%) aged 18 to 24, 5 people (8.6%) aged 25 to 44, 36 people (62.1%) aged 45 to 64, and 7 people (12.1%) who were 65 years of age or older. The median age was 53.0 years. For every 100 females there were 123.1 males. For every 100 females age 18 and over, there were 117.4 males.
There were 40 housing units at an average density of 114.6 per square mile (44.3/km²), of which 16 (59.3%) were owner-occupied, and 11 (40.7%) were occupied by renters. The homeowner vacancy rate was 5.9%; the rental vacancy rate was 0%. 37 people (63.8% of the population) lived in owner-occupied housing units and 21 people (36.2%) lived in rental housing units.
- U.S. Census
- U.S. Geological Survey Geographic Names Information System: Alleghany, California
- Gudde, Erwin; William Bright (2004). California Place Names (Fourth ed. ed.). University of California Press. pp. p. 9. ISBN 0-520-24217-3.
- All data are derived from the United States Census Bureau reports from the 2010 United States Census, and are accessible on-line here. The data on unmarried partnerships and same-sex married couples are from the Census report DEC_10_SF1_PCT15. All other housing and population data are from Census report DEC_10_DP_DPDP1. Both reports are viewable online or downloadable in a zip file containing a comma-delimited data file. The area data, from which densities are calculated, are available on-line here. Percentage totals may not add to 100% due to rounding. The Census Bureau defines families as a household containing one or more people related to the householder by birth, opposite-sex marriage, or adoption. People living in group quarters are tabulated by the Census Bureau as neither owners nor renters. For further details, see the text files accompanying the data files containing the Census reports mentioned above.
- "Senators". State of California. Retrieved March 10, 2013.
- "Members Assembly". State of California. Retrieved March 2, 2013.
- "California's 1st Congressional District - Representatives & District Map". Civic Impulse, LLC. Retrieved March 3, 2013.
Further reading 
- History of Sierra County, by James J. Sinnott, vol.3: Allegheny and Forest City: Treasure Towns, published by California Traveler, Volcano, California, 1975.