13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| The Dalles | 1 | 15,636 | 16,010 | -0.48% | 2,339 | 6.68 | City |
| Chenoweth | 2 | 1,682 | 1,703 | -0.71% | 299 | 5.63 | CDP |
| Dufur | 3 | 627 | 636 | -0.32% | 1,065 | 0.59 | City |
| Pine Hollow | 4 | 478 | 404 | -0.21% | 215 | 2.22 | CDP |
| Mosier | 5 | 461 | 465 | -0.22% | 1,011 | 0.46 | City |
| Maupin | 6 | 416 | 421 | -0.24% | 298 | 1.40 | City |
| Rowena | 7 | 104 | 203 | -5.45% | 58 | 1.81 | CDP |
| Sportsmans Park | 8 | 84 | 64 | 7.69% | 571 | 0.15 | CDP |
| Pine Grove | 9 | 78 | 86 | -6.02% | 13 | 6.03 | CDP |
| Wamic | 10 | 65 | 42 | 6.56% | 54 | 1.21 | CDP |
| Antelope | 11 | 39 | 39 | 0% | 85 | 0.46 | City |
| Shaniko | 12 | 30 | 32 | 0% | 60 | 0.50 | City |
| Tygh Valley | 13 | 16 | 123 | -44.83% | 4 | 3.73 | CDP |
The Dalles is the largest city in Wasco County, with a population of 15,636.
Tygh Valley is the smallest city in Wasco County.
There are 13 cities in Wasco County, Oregon.