Identifiers: city · CDP · town
| Rank | Community | Population |
|---|---|---|
| 1 | Oakland (city), CA | 440,646 |
| 2 | Hayward (city), CA | 162,954 |
| 3 | Vallejo (city), CA | 126,090 |
| 4 | Berkeley (city), CA | 124,321 |
| 5 | Richmond (city), CA | 116,448 |
| 6 | Daly City (city), CA | 104,901 |
| 7 | San Leandro (city), CA | 91,008 |
| 8 | Alameda (city), CA | 78,280 |
| 9 | Walnut Creek (city), CA | 70,127 |
| 10 | Castro Valley (CDP), CA | 66,441 |
| 11 | San Rafael (city), CA | 61,271 |
| 12 | Danville (town), CA | 43,582 |
| 13 | Martinez (city), CA | 37,287 |
| 14 | Pleasant Hill (city), CA | 34,613 |
| 15 | San Pablo (city), CA | 32,127 |
| 16 | San Lorenzo (CDP), CA | 29,581 |
| 17 | Benicia (city), CA | 27,131 |
| 18 | El Cerrito (city), CA | 25,962 |
| 19 | Lafayette (city), CA | 25,391 |
| 20 | Ashland (CDP), CA | 23,823 |