Solano County, CA ZIP Codes & Directory
Complete postal guide for Solano County, California. Featuring the official county seat of Fairfield, largest municipality Vallejo, and serving 9 incorporated municipal entities.
Municipalities Located in Solano County
Incorporated Cities, Towns, and Villages
Benicia
cityZIPs: 94510
Birds Landing
cityZIPs: 94512
Dixon
cityZIPs: 95620
Fairfield
cityZIPs: 94533, 94534
Rio Vista
cityZIPs: 94571
Suisun City
cityZIPs: 94585
Travis AFB
cityZIPs: 94535
Vacaville
cityZIPs: 95687, 95688
Vallejo
cityZIPs: 94589, 94590 , +2 more
Active USPS ZIP Codes in Solano County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About Solano County, CA
What is the county seat and largest city in Solano County? ▾
The official county seat of Solano County is Fairfield, and its largest incorporated municipality by population is Vallejo.
How many cities, towns, and villages are in Solano County? ▾
Solano County encompasses 9 incorporated municipal entities, including 9 cities, 0 towns, and 0 villages.
What is the total population and land area of Solano County? ▾
According to official U.S. Census Bureau data, Solano County has a population of approximately 453,495 residents and spans an area of 822 square miles.
How many ZIP codes operate in Solano County? ▾
There are 14 active USPS ZIP codes serving addresses within Solano County, California.