9 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Crestview | 1 | 32,324 | 27,533 | 2.53% | 1,710 | 19 | City |
| Fort Walton Beach | 2 | 21,317 | 20,930 | 0.31% | 2,783 | 8 | City |
| Niceville | 3 | 18,949 | 15,859 | 2.79% | 1,317 | 14 | City |
| Destin | 4 | 14,017 | 13,938 | 0.09% | 1,871 | 7 | City |
| Valparaiso | 5 | 4,893 | 4,769 | 0.43% | 411 | 12 | City |
| Mary Esther | 6 | 4,108 | 3,994 | 0.46% | 2,823 | 1 | City |
| Shalimar | 7 | 765 | 740 | 0.53% | 2,666 | 0 | Town |
| Laurel Hill | 8 | 614 | 589 | 0.66% | 157 | 4 | City |
| Cinco Bayou | 9 | 472 | 459 | 0.43% | 2,713 | 0 | Town |
Crestview is the largest city in Okaloosa County, with a population of 32,324.
Cinco Bayou is the smallest city in Okaloosa County, with a population of 472.
There are 9 cities in Okaloosa County, Florida.