Identifiers: city · town · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Vallejo (city), CA | 126,090 |
| 2 | Concord (city), CA | 125,410 |
| 3 | Berkeley (city), CA | 124,321 |
| 4 | Fairfield (city), CA | 119,881 |
| 5 | Richmond (city), CA | 116,448 |
| 6 | Antioch (city), CA | 115,291 |
| 7 | San Ramon (city), CA | 84,605 |
| 8 | Pittsburg (city), CA | 76,416 |
| 9 | Walnut Creek (city), CA | 70,127 |
| 10 | Brentwood (city), CA | 64,292 |
| 11 | Danville (town), CA | 43,582 |
| 12 | Oakley (city), CA | 43,357 |
| 13 | Martinez (city), CA | 37,287 |
| 14 | Pleasant Hill (city), CA | 34,613 |
| 15 | San Pablo (city), CA | 32,127 |
| 16 | Benicia (city), CA | 27,131 |
| 17 | Hercules (city), CA | 26,016 |
| 18 | El Cerrito (city), CA | 25,962 |
| 19 | Lafayette (city), CA | 25,391 |
| 20 | Bay Point (CDP), CA | 23,896 |