| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Crestview | 1 | 31,970 | 27,516 | 2.49% | 1,691 | 19 | City |
| Fort Walton Beach | 2 | 21,158 | 20,947 | 0.29% | 2,762 | 8 | City |
| Niceville | 3 | 18,453 | 15,857 | 2.81% | 1,282 | 14 | City |
| Destin | 4 | 14,051 | 14,043 | 0.04% | 1,875 | 7 | City |
| Valparaiso | 5 | 4,917 | 4,768 | 0.43% | 413 | 12 | City |
| Mary Esther | 6 | 4,112 | 3,990 | 0.46% | 2,826 | 1 | City |
| Shalimar | 7 | 761 | 739 | 0.4% | 2,652 | 0 | Town |
| Laurel Hill | 8 | 567 | 542 | 0.71% | 145 | 4 | City |
| Cinco Bayou | 9 | 475 | 460 | 0.42% | 2,730 | 0 | Town |
Crestview is the largest city in Okaloosa County, with a population of 31,970.
Cinco Bayou is the smallest city in Okaloosa County, with a population of 475.
There are 9 cities in Okaloosa County, Florida.