Zip Code | City | Population |
|---|---|---|
| 94533 | Fairfield | 78,129 |
| 95687 | Vacaville | 68,996 |
| 94591 | Vallejo | 59,026 |
| 94534 | Fairfield | 41,395 |
| 95688 | Vacaville | 40,147 |
| 94590 | Vallejo | 37,991 |
| 94589 | Vallejo | 29,959 |
| 94585 | Suisun City | 29,401 |
| 94510 | Benicia | 27,223 |
| 95620 | Dixon | 22,004 |
| 94571 | Rio Vista | 10,514 |
| 94535 | Travis Afb | 3,873 |
| 94592 | Vallejo | 1,020 |
| 95625 | Elmira | 88 |
| 94512 | Birds Landing | 57 |