19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Omak | 1 | 5,099 | 4,861 | 0.95% | 1,354 | 3.77 | City |
| Okanogan | 2 | 2,450 | 2,370 | 0.66% | 1,218 | 2.01 | City |
| Brewster | 3 | 2,082 | 1,987 | 0.92% | 1,807 | 1.15 | City |
| Oroville | 4 | 1,880 | 1,809 | 0.75% | 1,112 | 1.69 | City |
| Coulee Dam | 5 | 1,229 | 1,213 | 0.24% | 1,716 | 0.72 | Town |
| Tonasket | 6 | 1,118 | 1,097 | 0.36% | 1,184 | 0.94 | City |
| Twisp | 7 | 1,110 | 997 | 2.12% | 950 | 1.17 | Town |
| Malott | 8 | 1,037 | 736 | 3.7% | 563 | 1.84 | CDP |
| Winthrop | 9 | 626 | 506 | 3.99% | 650 | 0.96 | Town |
| Pateros | 10 | 623 | 592 | 0.97% | 1,234 | 0.51 | City |
| Riverside | 11 | 337 | 324 | 0.9% | 380 | 0.89 | Town |
| Nespelem Community | 12 | 323 | 301 | 1.57% | 14 | 23.49 | CDP |
| North Omak | 13 | 322 | 410 | -6.94% | 29 | 11.20 | CDP |
| Elmer City | 14 | 246 | 241 | 0.41% | 1,034 | 0.24 | Town |
| Conconully | 15 | 196 | 191 | 0.51% | 929 | 0.21 | Town |
| Nespelem | 16 | 195 | 187 | 1.04% | 1,005 | 0.19 | Town |
| Methow | 17 | 112 | 126 | 6.67% | 166 | 0.68 | CDP |
| Loomis | 18 | 83 | 101 | -5.68% | 95 | 0.88 | CDP |
| Disautel | 19 | 22 | 15 | 4.76% | 6 | 3.92 | CDP |
Omak is the largest city in Okanogan County, with a population of 5,099.
Disautel is the smallest city in Okanogan County.
There are 19 cities in Okanogan County, Washington.