Identifiers: city · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | San Jose (city), CA | 1,013,240 |
| 2 | Oakland (city), CA | 440,646 |
| 3 | Fremont (city), CA | 230,504 |
| 4 | Hayward (city), CA | 162,954 |
| 5 | Sunnyvale (city), CA | 155,805 |
| 6 | Santa Clara (city), CA | 127,647 |
| 7 | San Mateo (city), CA | 105,661 |
| 8 | San Leandro (city), CA | 91,008 |
| 9 | Livermore (city), CA | 87,955 |
| 10 | San Ramon (city), CA | 84,605 |
| 11 | Redwood City (city), CA | 84,292 |
| 12 | Mountain View (city), CA | 82,376 |
| 13 | Milpitas (city), CA | 80,273 |
| 14 | Pleasanton (city), CA | 79,871 |
| 15 | Dublin (city), CA | 72,589 |
| 16 | Union City (city), CA | 70,143 |
| 17 | Palo Alto (city), CA | 68,572 |
| 18 | Castro Valley (CDP), CA | 66,441 |
| 19 | Cupertino (city), CA | 60,381 |
| 20 | Newark (city), CA | 47,529 |