Explore Suisun City local geography, civic resources and voter guides, with dated official population and registration facts for Solano County.
At a glance: Suisun City is an incorporated city in Solano County. Population: 29,720 (California Department of Finance estimate as of January 1, 2026). Registered voters: 17,822 (California Secretary of State, as of September 4, 2026).
Suisun City lies beside Suisun Slough at the northern edge of Suisun Marsh. Its historic waterfront and marina create a strong waterside identity despite its close urban connection with Fairfield. The Suisun City Marina and waterfront public spaces support boating and community gatherings. Heritage Park and the Suisun City Library provide neighborhood recreation and public learning away from the immediate harbor edge. Suisun City incorporated on October 9, 1868. It is a general-law municipality with a council-manager government, separate from both Fairfield and the wider Suisun Marsh jurisdictional landscape.
No. They are separate municipalities, even though their developed areas adjoin.
The downtown marina and waterfront are on Suisun Slough, connected to the larger marsh and bay waterway system.
Contact the Suisun City city clerk; Solano County's Registrar of Voters handles countywide voter services and official results.
17,822 (California Secretary of State, as of September 4, 2026).
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