19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tillamook | 1 | 5,178 | 5,223 | -0.17% | 2,720 | 1.90 | City |
| Pacific City | 2 | 1,950 | 1,234 | 3.23% | 524 | 3.72 | CDP |
| Rockaway Beach | 3 | 1,446 | 1,453 | -0.07% | 904 | 1.60 | City |
| Bay City | 4 | 1,385 | 1,387 | 0% | 1,081 | 1.28 | City |
| Bayside Gardens | 5 | 1,005 | 1,104 | 0.8% | 1,014 | 0.99 | CDP |
| Garibaldi | 6 | 820 | 827 | -0.12% | 832 | 0.99 | City |
| Manzanita | 7 | 664 | 609 | 1.68% | 809 | 0.82 | City |
| Pleasant Valley | 8 | 636 | 504 | 7.07% | 217 | 2.93 | CDP |
| Netarts | 9 | 590 | 743 | -1.83% | 227 | 2.60 | CDP |
| Oceanside | 10 | 500 | 465 | 2.04% | 482 | 1.04 | CDP |
| Wheeler | 11 | 426 | 430 | -0.23% | 816 | 0.52 | City |
| Neahkahnie | 12 | 378 | 271 | 7.39% | 579 | 0.65 | CDP |
| Nehalem | 13 | 272 | 274 | 0% | 1,015 | 0.27 | City |
| Cape Meares | 14 | 249 | 93 | 7.33% | 72 | 3.44 | CDP |
| Hebo | 15 | 243 | 130 | 0.41% | 149 | 1.63 | CDP |
| Beaver | 16 | 227 | 121 | 3.18% | 588 | 0.39 | CDP |
| Neskowin | 17 | 188 | 79 | 2.17% | 135 | 1.39 | CDP |
| Cloverdale | 18 | 147 | 146 | -4.55% | 183 | 0.80 | CDP |
| Idaville | 19 | 125 | 292 | -10.07% | 256 | 0.49 | CDP |
Tillamook is the largest city in Tillamook County, with a population of 5,178.
Idaville is the smallest city in Tillamook County.
There are 19 cities in Tillamook County, Oregon.