| City | County | 2025 Pop. ↓ |
|---|---|---|
| Hillsboro | Washington County | 108,223 |
| Happy Valley | Clackamas County | 31,321 |
| Hayesville | Marion County | 22,294 |
| Hermiston | Umatilla County | 19,518 |
| Hood River | Hood River County | 8,334 |
| Harrisburg | Linn County | 3,729 |
| Hubbard | Marion County | 3,330 |
| Heceta Beach | Lane County | 2,653 |
| Harbor | Curry County | 1,906 |
| Hines | Harney County | 1,611 |
| Heppner | Morrow County | 1,074 |
| Halsey | Linn County | 945 |
| Huntington | Baker County | 514 |
| Haines | Baker County | 383 |
| Halfway | Baker County | 370 |
| Holley | Linn County | 273 |
| Hebo | Tillamook County | 243 |
| Harper | Malheur County | 203 |
| Helix | Umatilla County | 188 |