15 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 94533 | Fairfield | 78,805 |
| 95687 | Vacaville | 69,390 |
| 94591 | Vallejo | 58,193 |
| 94534 | Fairfield | 41,203 |
| 95688 | Vacaville | 40,201 |
| 94590 | Vallejo | 37,128 |
| 94589 | Vallejo | 29,990 |
| 94585 | Suisun City | 29,357 |
| 94510 | Benicia | 26,749 |
| 95620 | Dixon | 22,223 |
| 94571 | Rio Vista | 10,974 |
| 94535 | Travis Afb | 3,952 |
| 94592 | Vallejo | 1,049 |
| 95625 | Elmira | 319 |
| 94512 | Birds Landing | 130 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 15 ZCTAs in Solano County, California (US Census).