Oregon Counties by Population (2026)
by Kristen Carney
Updated: February 9, 2026
The most populous counties in Oregon are Multnomah County with 801,477, Washington County at 603,947, Clackamas County with 423,975, Lane County at 384,207, and Marion County with 349,244. You can get the most current Census population data for all 36 Oregon counties, sorted from the most populous counties in Oregon to the least, according to the 2024 American Community Survey.
Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Oregon counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!
| Rank | County | Population |
|---|---|---|
| 1 | Multnomah County | 801,477 |
| 2 | Washington County | 603,947 |
| 3 | Clackamas County | 423,975 |
| 4 | Lane County | 384,207 |
| 5 | Marion County | 349,244 |
| 6 | Jackson County | 222,645 |
| 7 | Deschutes County | 206,334 |
| 8 | Linn County | 130,706 |
| 9 | Douglas County | 112,072 |
| 10 | Yamhill County | 108,734 |
| 11 | Benton County | 96,303 |
| 12 | Polk County | 89,662 |
| 13 | Josephine County | 88,179 |
| 14 | Umatilla County | 79,940 |
| 15 | Klamath County | 70,247 |
| 16 | Coos County | 64,827 |
| 17 | Columbia County | 53,493 |
| 18 | Lincoln County | 50,964 |
| 19 | Clatsop County | 41,363 |
| 20 | Malheur County | 31,954 |
| 21 | Tillamook County | 27,496 |
| 22 | Wasco County | 26,552 |
| 23 | Crook County | 26,277 |
| 24 | Union County | 26,144 |
| 25 | Jefferson County | 25,203 |
| 26 | Hood River County | 23,905 |
| 27 | Curry County | 23,381 |
| 28 | Baker County | 16,840 |
| 29 | Morrow County | 12,300 |
| 30 | Lake County | 8,267 |
| 31 | Wallowa County | 7,553 |
| 32 | Harney County | 7,499 |
| 33 | Grant County | 7,209 |
| 34 | Gilliam County | 1,971 |
| 35 | Sherman County | 1,938 |
| 36 | Wheeler County | 1,485 |
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United States Census Bureau. B01001 SEX BY AGE, 2024 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. January 29, 2026. http://www.census.gov/. |
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