7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tillamook | 1 | 5,125 | 5,220 | -0.31% | 2,692 | 2 | City |
| Rockaway Beach | 2 | 1,436 | 1,451 | -0.14% | 898 | 2 | City |
| Bay City | 3 | 1,377 | 1,389 | -0.15% | 1,077 | 1 | City |
| Garibaldi | 4 | 813 | 825 | -0.25% | 825 | 1 | City |
| Manzanita | 5 | 654 | 608 | 1.24% | 797 | 1 | City |
| Wheeler | 6 | 422 | 427 | -0.24% | 808 | 1 | City |
| Nehalem | 7 | 269 | 274 | -0.37% | 1,004 | 0 | City |
Tillamook is the largest city in Tillamook County, with a population of 5,125.
Nehalem is the smallest city in Tillamook County, with a population of 269.
There are 7 cities in Tillamook County, Oregon.