9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Crestview | 1 | 31,525 | 27,533 | 2.6% | 1,668 | 19 | City |
| Fort Walton Beach | 2 | 21,252 | 20,930 | 0.3% | 2,774 | 8 | City |
| Niceville | 3 | 18,434 | 15,859 | 2.87% | 1,281 | 14 | City |
| Destin | 4 | 14,004 | 13,938 | 0.09% | 1,869 | 7 | City |
| Valparaiso | 5 | 4,872 | 4,769 | 0.41% | 409 | 12 | City |
| Mary Esther | 6 | 4,089 | 3,994 | 0.47% | 2,810 | 1 | City |
| Shalimar | 7 | 761 | 740 | 0.53% | 2,652 | 0 | Town |
| Laurel Hill | 8 | 610 | 589 | 0.66% | 156 | 4 | City |
| Cinco Bayou | 9 | 470 | 459 | 0.43% | 2,701 | 0 | Town |
Crestview is the largest city in Okaloosa County, with a population of 31,525.
Cinco Bayou is the smallest city in Okaloosa County, with a population of 470.
There are 9 cities in Okaloosa County, Florida.