Ranking of Oregon Counties By Population in 2018
Updated on January 28, 2024.
Based on the US Census Vintage data estimates, in 2018, the Population for Oregon was 4.18M. Among all Oregon counties, Multnomah County had the highest population (809.45K), followed by Washington County (597.03K), and Clackamas County (415.59K).
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), 2018 Census.
See this for other years:
Ranking of Oregon Counties By Population in 2018
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| Rank | County | Population |
|---|---|---|
| 1 | Multnomah County | 809448 |
| 2 | Washington County | 597030 |
| 3 | Clackamas County | 415586 |
| 4 | Lane County | 378807 |
| 5 | Marion County | 345512 |
| 6 | Jackson County | 219616 |
| 7 | Deschutes County | 191770 |
| 8 | Linn County | 127455 |
| 9 | Douglas County | 110164 |
| 10 | Yamhill County | 106390 |
| 11 | Benton County | 92511 |
| 12 | Josephine County | 87418 |
| 13 | Polk County | 84854 |
| 14 | Umatilla County | 77332 |
| 15 | Klamath County | 67810 |
| 16 | Coos County | 64338 |
| 17 | Columbia County | 52408 |
| 18 | Lincoln County | 49320 |
| 19 | Clatsop County | 39730 |
| 20 | Malheur County | 30633 |
| 21 | Union County | 26733 |
| 22 | Tillamook County | 26710 |
| 23 | Wasco County | 26346 |
| 24 | Jefferson County | 24085 |
| 25 | Crook County | 23789 |
| 26 | Hood River County | 23228 |
| 27 | Curry County | 22850 |
| 28 | Baker County | 16024 |
| 29 | Morrow County | 11349 |
| 30 | Lake County | 7861 |
| 31 | Harney County | 7278 |
| 32 | Grant County | 7169 |
| 33 | Wallowa County | 7043 |
| 34 | Gilliam County | 1883 |
| 35 | Sherman County | 1702 |
| 36 | Wheeler County | 1356 |