Oregon Population By County in 2015

Updated on January 27, 2024.

Based on the US Census Vintage data estimates, in 2015, the population of Oregon was 4,018,542. Among all Oregon counties, Multnomah had the highest population (790,723), followed by Washington (572,955), and Clackamas (399,852). Wheeler was the least populated county (1,327).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Oregon Population By County in 2015
Oregon Population By County in 2015
County
Population
% of State Population
Multnomah 790,723 19.68
Washington 572,955 14.26
Clackamas 399,852 9.95
Lane 362,257 9.02
Marion 329,106 8.19
Jackson 211,587 5.27
Deschutes 174,392 4.34
Linn 120,303 2.99
Douglas 107,260 2.67
Yamhill 101,447 2.52
Benton 88,443 2.20
Josephine 84,606 2.11
Polk 79,012 1.97
Umatilla 76,491 1.90
Klamath 65,742 1.64
Coos 62,696 1.56
Columbia 49,671 1.24
Lincoln 47,046 1.17
Clatsop 37,848 0.94
Malheur 30,228 0.75
Union 25,720 0.64
Tillamook 25,554 0.64
Wasco 25,469 0.63
Hood River 22,925 0.57
Jefferson 22,540 0.56
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