|• Total||4.588 sq mi (11.882 km2)|
|• Land||4.588 sq mi (11.882 km2)|
|• Water||0 sq mi (0 km2) 0%|
|Elevation||213 ft (65 m)|
|• Density||190/sq mi ( 73/km2)|
|Time zone||PST (UTC-8)|
|• Summer (DST)||PDT (UTC-7)|
|GNIS feature ID||224138|
Geyserville (formerly Clairville) is an unincorporated community and census-designated place (CDP) in Sonoma County, California, USA. Located in the Wine Country, it is noted by tourists for its restaurants, bed and breakfast inns, and wineries. Silver Oak Cellars has a winery and vineyard in Geyserville. The population was 862 at the 2010 census.
Geyserville, located on the Rancho Tzabaco Mexican land grant, owes its foundation to the discovery in 1847 of a series of hot springs, fumaroles, and steam vents in a gorge in the mountains of Sonoma County, California, between Calistoga and Cloverdale. This complex, which became known as The Geysers, soon became a tourist attraction, and a settlement grew up to provide accommodation and serve as a gateway to The Geysers. It was initially known as Clairville but subsequently renamed Geyserville. After the San Francisco and North Pacific Railroad was extended to Cloverdale in the 1870s, its trains stopped in Geyserville.
According to the United States Census Bureau, the CDP covers an area of 4.6 square miles (11.9 km²), all of it land.
The 2010 United States Census reported that Geyserville had a population of 862. The population density was 187.9 people per square mile (72.5/km²). The racial makeup of Geyserville was 609 (70.6%) White, 5 (0.6%) African American, 7 (0.8%) Native American, 14 (1.6%) Asian, 0 (0.0%) Pacific Islander, 192 (22.3%) from other races, and 35 (4.1%) from two or more races. Hispanic or Latino of any race were 328 persons (38.1%).
The Census reported that 98.5% of the population lived in households and 1.5% lived in non-institutionalized group quarters.
There were 298 households, out of which 108 (36.2%) had children under the age of 18 living in them, 169 (56.7%) were opposite-sex married couples living together, 26 (8.7%) had a female householder with no husband present, 22 (7.4%) had a male householder with no wife present. There were 22 (7.4%) unmarried opposite-sex partnerships, and 2 (0.7%) same-sex married couples or partnerships. 51 households (17.1%) were made up of individuals and 14 (4.7%) had someone living alone who was 65 years of age or older. The average household size was 2.85. There were 217 families (72.8% of all households); the average family size was 3.17.
The population was spread out with 201 people (23.3%) under the age of 18, 71 people (8.2%) aged 18 to 24, 213 people (24.7%) aged 25 to 44, 293 people (34.0%) aged 45 to 64, and 84 people (9.7%) who were 65 years of age or older. The median age was 39.9 years. For every 100 females there were 116.0 males. For every 100 females age 18 and over, there were 122.6 males.
There were 325 housing units at an average density of 70.8 per square mile (27.4/km²), of which 58.4% were owner-occupied and 41.6% were occupied by renters. The homeowner vacancy rate was 1.7%; the rental vacancy rate was 0%. 55.7% of the population lived in owner-occupied housing units and 42.8% lived in rental housing units.
See also 
- U.S. Census
- "Geyserville". Geographic Names Information System, U.S. Geological Survey.
- "Census 2010: Table 3A — Total Population by Race (Hispanic exclusive) and Hispanic or Latino: 2010" (Excel). California Department of Finance. Retrieved March 22, 2010.
- Draper, Prudence and Lloyd (2004). Images of America: Cotati. Arcadia Publishing. ISBN 0-7385-2873-0.
- 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.