8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Seiling | 1 | 787 | 852 | -1.63% | 664 | 1.19 | City |
| Vici | 2 | 567 | 611 | -1.56% | 1,306 | 0.43 | Town |
| Leedey | 3 | 388 | 415 | -1.27% | 862 | 0.45 | Town |
| Taloga | 4 | 271 | 288 | -1.09% | 525 | 0.52 | Town |
| Camargo | 5 | 172 | 189 | -1.71% | 691 | 0.25 | Town |
| Fay | 6 | 70 | 62 | 7.69% | 140 | 0.50 | CDP |
| Oakwood | 7 | 67 | 74 | -1.47% | 283 | 0.24 | Town |
| Putnam | 8 | 26 | 28 | 0% | 306 | 0.09 | Town |
Seiling is the largest city in Dewey County, with a population of 787.
Putnam is the smallest city in Dewey County.
There are 8 cities in Dewey County, Oklahoma.