Solano County is a county located in the U.S. state of California. As of the 2020 census, its population was 453,491. The county seat is Fairfield. Solano County comprises the Vallejo–Fairfield metropolitan statistical area, which is also included in the San Jose–San Francisco–Oakland, 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.

Country: United States
State: California
Region: San Francisco Bay Area
Incorporated: February 18, 1850
Named for: Chief Solano of the Suisun people
County seat: Fairfield
Largest city: Vallejo (population), Fairfield (area)
Type: Council–Administrator
Chair: John Vasquez
Vice Chair: Monica Brown
County Administrator: William F. Emlen
Population (2020): 453,491
Time zone: Pacific Time Zone (UTC−8)
Summer (DST): Pacific Daylight Time (UTC−7)
Area code: 707
FIPS code: 06-095
GNIS feature ID: 277312
Congressional districts: 4th, 7th, 8th
Website: [www.solanocounty.com]
Official Website: https://www.solanocounty.com/
Wikidata description: county in California, United States of America
Wikidata id: Q108083
Wikidata label: Solano County
Wikidata aliases: Array
Source
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