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Solano County, California

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Country  United States
Incorporated  February 18, 1850
Area  2,346 km²
County seat  Fairfield
Region  San Francisco Bay Area
Highest elevation  2,822 ft (860 m)
Population  424,788 (2013)
Area code  Area code 707

Largest city  Vallejo (population) Fairfield (area)
Time zone  Pacific Time Zone (UTC-8)
Destinations  Fairfield, Vallejo, Benicia, Vacaville
Colleges and Universities  Solano Community College, California State University, Touro University California, Blake Austin College, Hinton Barber and Beauty C
Points of interest  Six Flags Discovery Kingdom, Western Railway Museum, Benicia Capitol State Hist, Mare Island, Travis Air Force Base Heritage

Mount alfonso ranch solano county california

Solano County is a county located in the U.S. state of California. As of the 2010 census, the population was 413,344. The county seat is Fairfield.


Map of Solano County, CA, USA

Solano County comprises the Vallejo-Fairfield, CA Metropolitan Statistical Area, which is also included in the San Jose-San Francisco-Oakland, CA Combined Statistical Area. Solano County is the northeastern county in the nine-county San Francisco Bay Area region.

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


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 derives its name directly from an Indian Chief, 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. "Solano" is a common surname in the north of Spain, especially in Navarra, Zaragoza and La Rioja.

Travis Air Force Base is located just east of Fairfield.


Solano County is the easternmost county of the North Bay. As such, it is sometimes reported by news agencies as being in the East Bay. Additionally, a portion of the county extends into the Sacramento Valley, geographically.


According to the U.S. Census Bureau, the county has a total area of 906 square miles (2,350 km2), of which 822 square miles (2,130 km2) is land and 84 square miles (220 km2) (9.3%) is water.

Solano County has several inactive cinnabar mines including the Hastings Mine and St. John's Mine, both of which are subject to ongoing environmental monitoring; these mines were worked in the first half of the twentieth century.


Solano County has a number of rare and endangered species including the beetle Elaphrus viridis, the wildflower Lasthenia conjugens, commonly known as Contra Costa goldfields and the annual plant Legenere limosa or False Venus' looking glass.

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)
  • Public transportation

    Solano County is served by several transit agencies:

  • SolTrans, formed as a merger between these two existing transit agencies:
  • Vallejo Transit, which used to also operate 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 each other, 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.


    General aviation airports in Solano County which are open to the public are the Nut Tree Airport and Rio Vista Municipal Airport.


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


    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%). 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 all of the United States.


    As of the census of 2000, there were 394,542 people, 130,403 households, and 97,411 families residing in the county. The population density was 476 people per square mile (184/km²). There were 134,513 housing units at an average density of 162 per square mile (63/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.

    There were 130,403 households out of which 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 all households were made up of individuals and 6.5% had someone living alone who was 65 years of age or older. The average household size was 2.90 and the average family size was 3.33.

    In the county, the population was spread out with 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% who were 65 years of age 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 income for a household in the county was $54,099, and the median income for a family 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.


    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 January 2013 the members of the Solano County Board of Supervisors were:

  • Erin Hannigan, District 1
  • Linda Seifert, District 2, Chairman
  • Jim Spering, District 3
  • John Vasquez, District 4
  • Skip Thomson, District 5, Vice-Chairman
  • Voter registration statistics

    Cities by population and voter registration


    Solano is a strongly Democratic county in presidential and congressional elections, though it usually gives somewhat higher vote percentages to Republicans compared to the eight other Bay Area counties. The last Republican to win a majority in the county was Ronald Reagan in 1984.

    Solano County is split between California's 3rd and 5th congressional districts, represented by John Garamendi (D–Walnut Grove) and Mike Thompson (D–St. Helena), respectively.

    In the California State Assembly, Solano County is split between the 4th Assembly District, represented by Democrat Cecilia Aguiar-Curry, and the 11th Assembly District, represented by Democrat Jim Frazier. In the California State Senate, it is in the 3rd Senate District, represented by Democrat Bill Dodd.

    On Nov. 4, 2008, Solano County voted 55.9% for Proposition 8, which amended the California Constitution to ban same-sex marriages. It was the only Bay Area county to approve the initiative. 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%).

    According to the California Secretary of State, as of October 22, 2012, Solano County has 209,484 registered voters, out of 274,284 eligible (76.4%). Of those, 101,815 (48.6%) are registered Democrats, 52,777 (25.2%) are registered Republicans, and 45,581 (21.8%) have declined to state a political party. 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%).

    Census-designated places

  • Allendale
  • Elmira
  • Green Valley
  • Hartley
  • Population ranking

    The population ranking of the following table is based on the 2010 census of Solano County.

    county seat


  • 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.
  • References

    Solano County, California Wikipedia

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