| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coos Bay | 1 | 15,631 | 15,990 | -0.35% | 1,471 | 11 | City |
| North Bend | 2 | 9,896 | 10,306 | -0.7% | 2,517 | 4 | City |
| Coquille | 3 | 3,930 | 4,011 | -0.33% | 1,422 | 3 | City |
| Bandon | 4 | 3,290 | 3,336 | -0.21% | 1,192 | 3 | City |
| Myrtle Point | 5 | 2,458 | 2,485 | -0.16% | 1,530 | 2 | City |
| Lakeside | 6 | 1,852 | 1,907 | -0.59% | 926 | 2 | City |
| Powers | 7 | 700 | 714 | -0.28% | 1,199 | 1 | City |
Coos Bay is the largest city in Coos County, with a population of 15,631.
Powers is the smallest city in Coos County, with a population of 700.
There are 7 cities in Coos County, Oregon.