34 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Anaheim | 1 | 343,509 | 346,665 | -0.15% | 6,832 | 50 | City |
| Irvine | 2 | 323,799 | 308,450 | 0.8% | 4,935 | 66 | City |
| Santa Ana | 3 | 318,663 | 311,226 | 0.39% | 11,640 | 27 | City |
| Huntington Beach | 4 | 190,515 | 198,422 | -0.69% | 6,982 | 27 | City |
| Garden Grove | 5 | 172,608 | 171,866 | 0.07% | 9,614 | 18 | City |
| Fullerton | 6 | 138,382 | 143,398 | -0.6% | 6,172 | 22 | City |
| Orange | 7 | 137,171 | 139,481 | -0.28% | 5,344 | 26 | City |
| Costa Mesa | 8 | 107,671 | 112,050 | -0.67% | 6,812 | 16 | City |
| Mission Viejo | 9 | 90,670 | 93,463 | -0.51% | 5,134 | 18 | City |
| Westminster | 10 | 88,918 | 90,775 | -0.35% | 8,857 | 10 | City |
| Lake Forest | 11 | 87,775 | 85,926 | 0.35% | 5,252 | 17 | City |
| Buena Park | 12 | 81,981 | 83,870 | -0.38% | 7,788 | 11 | City |
| Newport Beach | 13 | 81,873 | 85,163 | -0.66% | 3,436 | 24 | City |
| Tustin | 14 | 78,352 | 79,885 | -0.32% | 7,044 | 11 | City |
| Yorba Linda | 15 | 65,617 | 68,232 | -0.66% | 3,289 | 20 | City |
| Laguna Niguel | 16 | 64,008 | 64,538 | -0.14% | 4,344 | 15 | City |
| San Clemente | 17 | 61,832 | 64,217 | -0.64% | 3,371 | 18 | City |
| La Habra | 18 | 60,582 | 63,009 | -0.66% | 8,015 | 8 | City |
| Fountain Valley | 19 | 55,568 | 56,972 | -0.42% | 6,126 | 9 | City |
| Placentia | 20 | 53,759 | 52,666 | 0.34% | 7,986 | 7 | City |
| Aliso Viejo | 21 | 49,647 | 52,076 | -0.81% | 7,168 | 7 | City |
| Cypress | 22 | 48,902 | 50,053 | -0.39% | 7,394 | 7 | City |
| Brea | 23 | 48,145 | 47,242 | 0.31% | 3,807 | 13 | City |
| Rancho Santa Margarita | 24 | 45,595 | 47,868 | -0.82% | 3,527 | 13 | City |
| Stanton | 25 | 42,740 | 38,083 | 1.85% | 13,774 | 3 | City |
| San Juan Capistrano | 26 | 35,624 | 35,159 | 0.22% | 2,469 | 14 | City |
| Dana Point | 27 | 32,344 | 33,067 | -0.37% | 4,987 | 6 | City |
| Laguna Hills | 28 | 29,912 | 31,310 | -0.77% | 4,568 | 7 | City |
| Seal Beach | 29 | 24,036 | 25,191 | -0.79% | 2,126 | 11 | City |
| Laguna Beach | 30 | 22,343 | 23,005 | -0.49% | 2,506 | 9 | City |
| Laguna Woods | 31 | 16,781 | 17,612 | -0.82% | 5,021 | 3 | City |
| La Palma | 32 | 14,857 | 15,561 | -0.78% | 8,342 | 2 | City |
| Los Alamitos | 33 | 11,880 | 11,777 | 0.14% | 2,964 | 4 | City |
| Villa Park | 34 | 5,631 | 5,832 | -0.58% | 2,711 | 2 | City |
Anaheim is the largest city in Orange County, with a population of 343,509.
Villa Park is the smallest city in Orange County, with a population of 5,631.
There are 34 cities in Orange County, California.