California Counties
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California Counties

The state of California is divided into fifty-eight counties. On January 4, 1850, the California constitutional committee recommended the formation of 18 counties. They were Benicia, Butte, Fremont, Los Angeles, Mariposa, Monterey, Mount Diablo, Oro, Redding, Sacramento, San Diego, San Francisco, San Joaquin, San Jose, San Luis Obispo, Santa Barbara, Sonoma, and Sutter. The last California county to have been established is Imperial County in 1907.

Solano County, California

Solano County Education, Geography, and HistorySolano County, Califronia Courthouse

Solano County is a county located in the state of California. Based on the 2010 census, the population was 413,344. The county seat is Fairfield, and the largest city is Vallejo. The county was created February 18, 1850. The county is named indirectly from that of the Franciscan missionary, Father Francisco Solano.

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.

Etymology - Origin of Solano County Name

The county derives its name indirectly from that of the Franciscan missionary, Father Francisco Solano, whose name was given in baptism to the chief of one of the Indian tribes of the region. Before receiving the name Solano, the chief was called Sem-yeto, which signifies "brave or fierce hand." At the request of General Mariano Vallejo, the county was named for Chief Solano, who at one time ruled over most of the land and tribes between the Petaluma Creek and the Sacramento River.


County QuickFacts: CensusBureau Quick Facts

Solano County History

Solano County was one of the original counties of California, created in 1850 at the time of statehood. Prior to statehood, it had been referred to as Benicia County. The county seat is Fairfield and the largest city is Vallejo.

Maybe no county in the State has had so important a history as Solano, lying as the county does in a sense at the portal to the great interior valleys and the mining regions. Solano county has had the vision of great cities and of metropolitan importance. All these things were disappointments, however, and the county has fallen back to not less solid, if less brilliant, advances in the way of fruit culture and the growth of grain, while still her two cities of Vallejo and Benicia keep up the prestige that attaches always to things naval or military.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 907 square miles (2,348 km2), of which, 829 square miles (2,148 km2) of it is land and 77 square miles (201 km2) of it (8.55%) is water.

 Solano County is made up of rolling hillsides, waterfronts and fertile farmland. A portion of the South Campus at the University of California, Davis is in Solano County.

Neighboring Counties

Bordering counties are as follows:

  • North: Yolo County
  • Northeast: Sacramento County
  • South: Contra Costa County
  • Southwest: San Francisco Bay
  • Northwest: Sonoma County; Napa County


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