Solano County, California

Solano County
Solano County
County
	Vallejo and the Napa River Benicia Fairfield Vacaville Suisun City Mount Vaca and the Vaca Mountains
	Flag Seal
	Interactive map of Solano County
	Location in the state of California
	Coordinates: 38°16′N 121°56′W / 38.27°N 121.94°W
Country	United States
State	California
Region	Bay Area
Incorporated	February 18, 1850
Named for	Chief Solano of the Suisun people
County seat	Fairfield
Largest city	Vallejo (population); Fairfield (area)
Government
• Type	Council–Administrator
• Body	Board of Supervisors Cassandra James; Monica Brown; Wanda Williams; John Vasquez; Mitch Mashburn;
• Chair	Monica Brown
• Vice Chair	Cassandra James
• Chair Pro Tem	Wanda Williams
• County Administrator	William F. Emlen
Area
• Total	906 sq mi (2,350 km2)
• Land	810 sq mi (2,100 km2)
• Water	96 sq mi (250 km2)
Highest elevation	2,822 ft (860 m)
Population (2020)
• Total	453,491
• Estimate (2025)	455,376
• Density	552/sq mi (213/km2)
GDP
• Total	$35.408 billion (2022)
Time zone	UTC−8 (Pacific Time Zone)
• Summer (DST)	UTC−7 (Pacific Daylight Time)
Area code	707, 369
FIPS code	06-095
GNIS feature ID	277312
Congressional districts	4th, 7th, 8th
Website	www.solanocounty.com

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Solano County (/səˈlɑːnoʊ/ ^ⓘ) is a county in the northeastern San Francisco Bay Area. As of the 2020 census, its population was 453,491. The county seat is Fairfield.