The graph below ranks each Oregon County by total residents according to the 2006 census estimates.
Oregon total population by county
| County | Total Population |
| Multnomah |  681,454 |
| Washington | 514,269 |
| Clackamas | 374,230 |
| Lane | 337,870 |
| Marion | 311,304 |
| Jackson | 197,071 |
| Deschutes | 149,140 |
| Linn | 111,489 |
| Douglas | 105,117 |
| Yamhill | 94,678 |
| Josephine | 81,688 |
| Benton | 79,061 |
| Polk | 73,296 |
| Umatilla | 72,928 |
| Klamath | 66,438 |
| Coos | 64,820 |
| Columbia | 49,163 |
| Lincoln | 46,199 |
| Clatsop | 37,315 |
| Malheur | 31,247 |
| Tillamook | 25,380 |
| Union | 24,345 |
| Wasco | 23,712 |
| Crook | 22,941 |
| Curry | 22,358 |
| Hood River | 21,533 |
| Jefferson | 20,352 |
| Baker | 16,243 |
| Morrow | 11,753 |
| Lake | 7,473 |
| Grant | 7,250 |
| Harney | 6,888 |
| Wallowa | 6,875 |
| Gilliam | 1,775 |
| Sherman | 1,699 |
| Wheeler | 1,404 |