Oregon Counties by Land Area
Want to know about the largest to smallest counties in Oregon, USA in terms of total land area? Check this resource Oregon counties by land area to discover all the details regarding county map (boundary), and nearby counties. On the other hand, check Oregon counties by population and Oregon cities by population to know more about city and county based demographic details.
What is the largest county in Oregon by land area?
Harney County is the largest county in Oregon spanning 10134.44 square miles, with an additional 93.27 square miles of water area. Following Harney County, Malheur County ranks as the second largest in terms of land area, covering 9887.71 square miles, while Lake County secures the position as the third largest county in Oregon.
What is the smallest county by land area in Oregon?
Multnomah County is the smallest in Oregon by total land area, covers about 431.02 square miles.
What is the largest county by population in Oregon?
Multnomah County in Oregon, USA, stands as the most populous county having 815,428 residents as per the 2022 census data.
What is the smallest county by population in Oregon?
Wheeler County is the smallest in Oregon by total population, having 1,451 residents as per the 2022 census data.
| Rank | County in Oregon | Land Area square miles | Water Area square miles | Total Area square miles |
|---|---|---|---|---|
| 1 | Harney County | 10,134 | 93 | 10,228 |
| 2 | Malheur County | 9,888 | 42 | 9,930 |
| 3 | Lake County | 8,139 | 219 | 8,358 |
| 4 | Klamath County | 5,950 | 187 | 6,137 |
| 5 | Douglas County | 5,036 | 97 | 5,133 |
| 6 | Lane County | 4,554 | 168 | 4,722 |
| 7 | Grant County | 4,528 | 1 | 4,529 |
| 8 | Umatilla County | 3,215 | 16 | 3,232 |
| 9 | Wallowa County | 3,146 | 5 | 3,151 |
| 10 | Deschutes County | 3,018 | 37 | 3,054 |
| 11 | Crook County | 2,979 | 8 | 2,987 |
| 12 | Jackson County | 2,783 | 18 | 2,801 |
| 13 | Wasco County | 2,381 | 14 | 2,395 |
| 14 | Linn County | 2,290 | 19 | 2,309 |
| 15 | Union County | 2,037 | 2 | 2,039 |
| 16 | Morrow County | 2,031 | 17 | 2,048 |
| 17 | Clackamas County | 1,871 | 12 | 1,883 |
| 18 | Jefferson County | 1,782 | 10 | 1,792 |
| 19 | Wheeler County | 1,716 | 0 | 1,717 |
| 20 | Josephine County | 1,639 | 2 | 1,641 |
| 21 | Curry County | 1,628 | 361 | 1,989 |
| 22 | Coos County | 1,596 | 210 | 1,806 |
| 23 | Gilliam County | 1,205 | 18 | 1,223 |
| 24 | Marion County | 1,181 | 10 | 1,191 |
| 25 | Tillamook County | 1,103 | 229 | 1,332 |
| 26 | Lincoln County | 981 | 214 | 1,195 |
| 27 | Clatsop County | 828 | 255 | 1,084 |
| 28 | Sherman County | 824 | 8 | 831 |
| 29 | Polk County | 741 | 3 | 744 |
| 30 | Washington County | 724 | 2 | 727 |
| 31 | Yamhill County | 716 | 2 | 718 |
| 32 | Benton County | 675 | 3 | 678 |
| 33 | Columbia County | 659 | 30 | 689 |
| 34 | Hood River County | 522 | 11 | 533 |
| 35 | Multnomah County | 431 | 34 | 465 |