7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tillamook | 1 | 5,141 | 5,220 | -0.31% | 2,700 | 2 | City |
| Rockaway Beach | 2 | 1,438 | 1,451 | -0.21% | 899 | 2 | City |
| Bay City | 3 | 1,379 | 1,389 | -0.14% | 1,079 | 1 | City |
| Garibaldi | 4 | 815 | 825 | -0.24% | 827 | 1 | City |
| Manzanita | 5 | 646 | 608 | 1.1% | 787 | 1 | City |
| Wheeler | 6 | 423 | 427 | -0.24% | 810 | 1 | City |
| Nehalem | 7 | 270 | 274 | -0.37% | 1,007 | 0 | City |
Tillamook is the largest city in Tillamook County, with a population of 5,141.
Nehalem is the smallest city in Tillamook County, with a population of 270.
There are 7 cities in Tillamook County, Oregon.