Identifiers: city · town · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Vallejo (city), CA | 126,090 |
| 2 | Concord (city), CA | 125,410 |
| 3 | Antioch (city), CA | 115,291 |
| 4 | Pittsburg (city), CA | 76,416 |
| 5 | Walnut Creek (city), CA | 70,127 |
| 6 | Brentwood (city), CA | 64,292 |
| 7 | Danville (town), CA | 43,582 |
| 8 | Oakley (city), CA | 43,357 |
| 9 | Martinez (city), CA | 37,287 |
| 10 | Pleasant Hill (city), CA | 34,613 |
| 11 | Benicia (city), CA | 27,131 |
| 12 | Lafayette (city), CA | 25,391 |
| 13 | Bay Point (CDP), CA | 23,896 |
| 14 | Orinda (city), CA | 19,514 |
| 15 | Pinole (city), CA | 19,022 |
| 16 | El Sobrante (CDP), CA | 15,524 |
| 17 | Discovery Bay (CDP), CA | 15,358 |
| 18 | Alamo (CDP), CA | 15,314 |
| 19 | Clayton (city), CA | 11,070 |
| 20 | Rio Vista (city), CA | 10,005 |