| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Anaheim | 1 | 340,018 | 346,645 | -0.29% | 6,762 | 50 | City |
| Irvine | 2 | 321,138 | 308,368 | 0.74% | 4,894 | 66 | City |
| Santa Ana | 3 | 316,476 | 311,236 | 0.28% | 11,560 | 27 | City |
| Huntington Beach | 4 | 189,985 | 198,480 | -0.77% | 6,962 | 27 | City |
| Garden Grove | 5 | 170,221 | 171,861 | -0.14% | 9,481 | 18 | City |
| Orange | 6 | 138,080 | 139,463 | -0.21% | 5,380 | 26 | City |
| Fullerton | 7 | 137,712 | 143,464 | -0.69% | 6,142 | 22 | City |
| Costa Mesa | 8 | 108,122 | 112,043 | -0.7% | 6,841 | 16 | City |
| Mission Viejo | 9 | 89,897 | 93,459 | -0.65% | 5,090 | 18 | City |
| Westminster | 10 | 88,580 | 90,771 | -0.43% | 8,824 | 10 | City |
| Lake Forest | 11 | 86,498 | 85,931 | 0.19% | 5,175 | 17 | City |
| Newport Beach | 12 | 81,348 | 85,165 | -0.77% | 3,414 | 24 | City |
| Buena Park | 13 | 81,332 | 83,815 | -0.5% | 7,726 | 11 | City |
| Tustin | 14 | 77,449 | 79,866 | -0.51% | 6,963 | 11 | City |
| Yorba Linda | 15 | 65,121 | 68,233 | -0.78% | 3,264 | 20 | City |
| Laguna Niguel | 16 | 63,960 | 64,542 | -0.23% | 4,340 | 15 | City |
| San Clemente | 17 | 61,848 | 64,214 | -0.61% | 3,372 | 18 | City |
| La Habra | 18 | 60,462 | 62,976 | -0.73% | 7,999 | 8 | City |
| Fountain Valley | 19 | 55,205 | 56,977 | -0.55% | 6,086 | 9 | City |
| Placentia | 20 | 55,203 | 52,662 | 0.53% | 8,200 | 7 | City |
| Aliso Viejo | 21 | 49,393 | 52,082 | -0.9% | 7,132 | 7 | City |
| Cypress | 22 | 48,530 | 50,052 | -0.51% | 7,337 | 7 | City |
| Brea | 23 | 47,363 | 47,241 | 0.22% | 3,745 | 13 | City |
| Rancho Santa Margarita | 24 | 45,357 | 47,867 | -0.92% | 3,508 | 13 | City |
| Stanton | 25 | 40,725 | 38,088 | 1.4% | 13,124 | 3 | City |
| San Juan Capistrano | 26 | 35,131 | 35,134 | 0.03% | 2,435 | 14 | City |
| Dana Point | 27 | 32,084 | 33,076 | -0.46% | 4,947 | 6 | City |
| Laguna Hills | 28 | 29,760 | 31,313 | -0.87% | 4,545 | 7 | City |
| Seal Beach | 29 | 23,869 | 25,116 | -0.86% | 2,111 | 11 | City |
| Laguna Beach | 30 | 22,260 | 23,004 | -0.59% | 2,497 | 9 | City |
| Laguna Woods | 31 | 16,689 | 17,608 | -0.92% | 4,994 | 3 | City |
| La Palma | 32 | 14,775 | 15,562 | -0.89% | 8,296 | 2 | City |
| Los Alamitos | 33 | 11,706 | 11,772 | 0.03% | 2,921 | 4 | City |
| Villa Park | 34 | 5,606 | 5,836 | -0.69% | 2,699 | 2 | City |
Anaheim is the largest city in Orange County, with a population of 340,018.
Villa Park is the smallest city in Orange County, with a population of 5,606.
There are 34 cities in Orange County, California.