7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Okmulgee | 1 | 11,433 | 11,290 | 0.25% | 664 | 17.22 | City |
| Henryetta | 2 | 5,595 | 5,637 | -0.14% | 817 | 6.85 | City |
| Morris | 3 | 1,331 | 1,305 | 0.38% | 1,091 | 1.22 | City |
| Beggs | 4 | 1,193 | 1,175 | 0.34% | 284 | 4.20 | City |
| Dewar | 5 | 761 | 756 | 0.13% | 752 | 1.01 | Town |
| Schulter | 6 | 433 | 423 | 0.46% | 510 | 0.85 | Town |
| Preston | 7 | 246 | 298 | 6.96% | 538 | 0.46 | CDP |
Okmulgee is the largest city in Okmulgee County, with a population of 11,433.
Preston is the smallest city in Okmulgee County.
There are 7 cities in Okmulgee County, Oklahoma.