Oregon Population By County in 2018
Updated on June 22, 2021.

According to the US Census Bureau population estimates, there were 4,181,886 people living in Oregon in 2018. Multnomah County was the most populated county with 809,072 residents, followed by Washington County with 596,904 residents, and Clackamas County with 415,416 residents. Wheeler County with a population of 1,351 was the least populated county in Oregon in 2018.

Use the map below to interactively explore the population of each county in Oregon in 2018. The data can also be explored further by sorting and filtering with the table below.

Hover/Click on the counties to see the values.
Oregon Population By County (2018)
See also Population estimate for other years:
Table of Oregon Population By County in 2018
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County Population % of State Population
Baker 16,034 0.38%
Benton 92,442 2.21%
Clackamas 415,416 9.93%
Clatsop 39,711 0.95%
Columbia 52,245 1.25%
Coos 64,272 1.54%
Crook 23,825 0.57%
Curry 22,795 0.55%
Deschutes 191,905 4.59%
Douglas 110,114 2.63%
Gilliam 1,893 0.05%
Grant 7,185 0.17%
Harney 7,292 0.17%
Hood River 23,267 0.56%
Jackson 219,411 5.25%
Jefferson 24,150 0.58%
Josephine 87,150 2.08%
Klamath 67,687 1.62%
Lake 7,835 0.19%
Lane 378,549 9.05%
Lincoln 49,224 1.18%
Linn 127,451 3.05%
Malheur 30,553 0.73%
Marion 345,412 8.26%
Morrow 11,360 0.27%
Multnomah 809,072 19.35%
Polk 84,992 2.03%
Sherman 1,700 0.04%
Tillamook 26,710 0.64%
Umatilla 77,421 1.85%
Union 26,701 0.64%
Wallowa 7,058 0.17%
Wasco 26,432 0.63%
Washington 596,904 14.27%
Wheeler 1,351 0.03%
Yamhill 106,367 2.54%