Identifiers: city
| Rank | Community | Population |
|---|---|---|
| 1 | Anaheim (city), CA | 346,824 |
| 2 | Santa Ana (city), CA | 310,227 |
| 3 | Irvine (city), CA | 307,670 |
| 4 | Huntington Beach (city), CA | 198,711 |
| 5 | Garden Grove (city), CA | 171,949 |
| 6 | Corona (city), CA | 157,136 |
| 7 | Orange (city), CA | 139,911 |
| 8 | Costa Mesa (city), CA | 111,918 |
| 9 | Mission Viejo (city), CA | 93,653 |
| 10 | Westminster (city), CA | 90,911 |
| 11 | Lake Forest (city), CA | 85,858 |
| 12 | Newport Beach (city), CA | 85,239 |
| 13 | Buena Park (city), CA | 84,034 |
| 14 | Tustin (city), CA | 80,276 |
| 15 | Yorba Linda (city), CA | 68,336 |
| 16 | Laguna Niguel (city), CA | 64,355 |
| 17 | San Clemente (city), CA | 64,293 |
| 18 | Fountain Valley (city), CA | 57,047 |
| 19 | Aliso Viejo (city), CA | 52,176 |
| 20 | Placentia (city), CA | 51,824 |