Solano County, California

Solano County
Interactive map of Solano County
Location in the state of California
Coordinates: 38°16′N 121°56′W / 38.27°N 121.94°W / 38.27; -121.94
CountryUnited States
StateCalifornia
RegionBay Area
IncorporatedFebruary 18, 1850
Named afterChief Solano of the Suisun people
County seatFairfield
Largest cityVallejo (population)
Fairfield (area)
Government
 • TypeCouncil–Administrator
 • Body
  • Cassandra James
  • Monica Brown
  • Wanda Williams
  • John Vasquez
  • Mitch Mashburn
 • ChairMonica Brown
 • Vice ChairCassandra James
 • Chair Pro TemWanda Williams
 • County AdministratorWilliam F. Emlen
Area
 • Total
906 sq mi (2,350 km2)
 • Land810 sq mi (2,100 km2)
 • Water96 sq mi (250 km2)
Highest elevation
2,822 ft (860 m)
Population
 (2020)
 • Total
453,491
 • Density552/sq mi (213/km2)
GDP
 • Total$35.408 billion (2022)
Time zoneUTC−8 (Pacific Time Zone)
 • Summer (DST)UTC−7 (Pacific Daylight Time)
Area code707, 369
FIPS code06-095
GNIS feature ID277312
Congressional districts4th, 7th, 8th
Websitewww.solanocounty.com

Solano County (/səˈlɑːn/ ) is a county 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 JoseSan FranciscoOakland, combined statistical area. Solano County is the northeastern county in the nine-county San Francisco Bay Area region.