Solano County, CA: Cities, ZIP Codes & Population
Solano County in California (FIPS 06095) contains 11 communities in our dataset. The largest is Vallejo, CA, and the listed places add up to roughly 517,871 residents. Below you can browse its cities, check its ZIP codes and find nearby counties.
What are the key facts about Solano County?
| County | Solano County |
|---|---|
| State | California |
| FIPS code | 06095 |
| Places in our data | 11 |
| Places with a city page | 7 |
| Combined place estimates | 517,871 |
| Largest place | Vallejo, CA (173,256) |
| Rank in state | 20th of 58 counties by combined place population |
| Weighted density | 3,499 per sq mi |
| Time zone | Pacific time |
| ZIP codes | 14 |
Which cities and towns are in Solano County?
Solano County has 7 places large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Vallejo, CA is the largest, followed by Fairfield, CA.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Vallejo, CA | Incorporated | 173,256 | 3,947 | 4 |
| Fairfield, CA | Incorporated | 148,683 | 2,841 | 4 |
| Vacaville, CA | Incorporated | 101,444 | 3,445 | 2 |
| Suisun City, CA | Incorporated | 29,663 | 7,304 | 1 |
| Benicia, CA | Incorporated | 28,240 | 2,199 | 1 |
| Dixon, CA | Incorporated | 20,803 | 2,929 | 1 |
| Rio Vista, CA | Incorporated | 9,718 | 1,476 | 1 |
The county also contains 4 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: Hartley, Green Valley, Allendale, Elmira. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Solano County compared with other counties in California?
Adding up the estimates for the places in our data gives 517,871 people, which ranks Solano County 20th among 58 counties in California. The average listed place has about 47,079 residents. The weighted density is about 3,499 people per square mile, which is suburban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Solano County?
The places in Solano County use 14 ZIP codes: 94510, 94533, 94534, 94535, 94571, 94585, 94589, 94590, 94591, 94592, 95620, 95625, 95687, 95688. Every code begins with 9, which is assigned to the Pacific states (Alaska, California, Hawaii, Oregon and Washington). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Solano County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Napa County, CA — about 24 miles northwest (center to center), 126,231 people in listed places
- Contra Costa County, CA — about 25 miles south (center to center), 1,836,522 people in listed places
- Yolo County, CA — about 27 miles north (center to center), 214,945 people in listed places
- Sacramento County, CA — about 38 miles northeast (center to center), 2,908,277 people in listed places
- Marin County, CA — about 39 miles southwest (center to center), 241,205 people in listed places
- Alameda County, CA — about 41 miles south (center to center), 1,665,305 people in listed places
What does the FIPS code 06095 mean?
The first two digits, 06, identify California, and the last three, 095, identify Solano County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the California hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.