Oregon Citizen Population By County in 2021 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2021, the citizen population for Oregon was 3,992,975 and represented 94.91% of the total Oregon population.

Among all Oregon counties, Multnomah had the highest citizen population (759.76K), followed by Washington (541.20K), and Clackamas (403.96K).

In terms of percentages, Douglas had the highest percentage of its population being citizens (99.24%), followed by Gilliam (99.23%), and Grant (99.17%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

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

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Oregon Citizen Voting-age Population By County in 2021

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Oregon Citizen Population By County in 2021

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County	Citizen Population	% of County Population
Multnomah	759755	93.80
Washington	541200	90.66
Clackamas	403960	96.51
Lane	369435	97.08
Marion	316190	91.91
Jackson	214865	96.93
Deschutes	189665	97.28
Linn	124045	97.52
Douglas	109840	99.24
Yamhill	102355	95.64
Benton	88380	93.36
Josephine	85900	97.96
Polk	83185	96.34
Umatilla	74555	93.77
Klamath	67035	97.29
Coos	63675	98.54
Columbia	51935	99.15
Lincoln	48470	97.20
Clatsop	39865	97.90
Malheur	29020	92.67
Tillamook	26235	96.70
Union	25845	98.44
Wasco	24845	93.39
Crook	24090	99.14
Jefferson	23395	96.55
Curry	22720	97.78
Hood River	21155	88.46
Baker	16370	98.97
Morrow	10330	86.34
Lake	7740	95.32
Harney	7385	99.06
Wallowa	7260	99.05
Grant	7165	99.17
Gilliam	1940	99.23
Sherman	1765	98.88
Wheeler	1420	96.27