11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coos Bay | 1 | 15,754 | 15,986 | -0.3% | 1,482 | 11 | City |
| North Bend | 2 | 9,983 | 10,312 | -0.66% | 2,539 | 4 | City |
| Coquille | 3 | 3,963 | 4,008 | -0.23% | 1,434 | 3 | City |
| Bandon | 4 | 3,305 | 3,334 | -0.18% | 1,197 | 3 | City |
| Myrtle Point | 5 | 2,467 | 2,482 | -0.12% | 1,535 | 2 | City |
| Bunker Hill | 6 | 2,268 | 2,244 | 2.49% | 1,553 | 1 | CDP |
| Saunders Lake | 7 | 2,208 | 1,469 | 7.18% | 776 | 3 | CDP |
| Lakeside | 8 | 1,847 | 1,899 | -0.59% | 924 | 2 | City |
| Barview | 9 | 1,697 | 1,704 | -0.53% | 1,228 | 1 | CDP |
| Glasgow | 10 | 959 | 964 | 1.37% | 298 | 3 | CDP |
| Powers | 11 | 701 | 709 | -0.28% | 1,200 | 1 | City |
Coos Bay is the largest city in Coos County, with a population of 15,754.
Powers is the smallest city in Coos County, with a population of 701.
There are 11 cities in Coos County, Oregon.