Ranking of Oregon Counties By Population in 2020
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2020, the Population for Oregon was 4.24M. Among all Oregon counties, Multnomah County had the highest population (816.32K), followed by Washington County (601.04K), and Clackamas County (422.51K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Oregon counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: Oregon Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2020 Census.
See this for other years:
Ranking of Oregon Counties By Population in 2020
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| Rank | County | Population |
|---|---|---|
| 1 | Multnomah County | 816321 |
| 2 | Washington County | 601045 |
| 3 | Clackamas County | 422512 |
| 4 | Lane County | 384221 |
| 5 | Marion County | 346305 |
| 6 | Jackson County | 223755 |
| 7 | Deschutes County | 199470 |
| 8 | Linn County | 128967 |
| 9 | Douglas County | 111292 |
| 10 | Yamhill County | 107740 |
| 11 | Benton County | 93615 |
| 12 | Josephine County | 88228 |
| 13 | Polk County | 88003 |
| 14 | Umatilla County | 79893 |
| 15 | Klamath County | 69631 |
| 16 | Coos County | 64976 |
| 17 | Columbia County | 52716 |
| 18 | Lincoln County | 50517 |
| 19 | Clatsop County | 41157 |
| 20 | Malheur County | 31643 |
| 21 | Tillamook County | 27462 |
| 22 | Wasco County | 26610 |
| 23 | Union County | 26168 |
| 24 | Crook County | 24930 |
| 25 | Jefferson County | 24578 |
| 26 | Hood River County | 23897 |
| 27 | Curry County | 23518 |
| 28 | Baker County | 16731 |
| 29 | Morrow County | 12220 |
| 30 | Lake County | 8174 |
| 31 | Harney County | 7504 |
| 32 | Wallowa County | 7400 |
| 33 | Grant County | 7233 |
| 34 | Gilliam County | 2015 |
| 35 | Sherman County | 1873 |
| 36 | Wheeler County | 1459 |