Explore Fairfield local geography, civic resources and voter guides, with dated official population and registration facts for Solano County.
At a glance: Fairfield is an incorporated city in Solano County. Population: 121,389 (California Department of Finance estimate as of January 1, 2026). Registered voters: 69,472 (California Secretary of State, as of September 4, 2026).
Fairfield occupies a broad inland setting between the Coast Range hills and Suisun Marsh. Interstate 80, the Cordelia area, and Travis Air Force Base help define its role as a regional employment and transportation center. Allan Witt Park includes major recreation facilities, including the city's aquatic and sports-center complex. The Civic Center and Fairfield Civic Center Library provide a concentrated public-service destination near downtown. Fairfield incorporated on December 12, 1903. It is a general-law city with a council-manager government and serves as Solano County's county seat.
The Allan Witt Park area contains Fairfield's aquatic complex and sports center; check current programs and access with the city.
No. They are neighboring incorporated cities with separate councils and municipal administrations.
No. Fairfield provides municipal services, while Solano County provides separate county functions, including election administration.
69,472 (California Secretary of State, as of September 4, 2026).
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