Oregon Citizen Population By County in 2015 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2015, the citizen population for Oregon was 3,706,755 and represented 94.10% of the total Oregon population.

Among all Oregon counties, Multnomah had the highest citizen population (707.14K), followed by Washington (501.76K), and Clackamas (374.48K).

In terms of percentages, Grant had the highest percentage of its population being citizens (99.52%), followed by Wallowa (99.49%), and Wheeler (99.26%).

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 2015

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

See this for other years:

Oregon Citizen Population By County in 2015

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County	Citizen Population	% of County Population
Multnomah	707140	92.03
Washington	501755	90.21
Clackamas	374480	96.16
Lane	343600	96.23
Marion	293000	90.64
Jackson	200805	96.37
Deschutes	162140	97.31
Linn	115950	97.46
Douglas	105755	98.66
Yamhill	95170	94.12
Josephine	81795	98.06
Benton	80905	93.54
Polk	73845	95.57
Umatilla	71000	92.52
Klamath	64275	97.43
Coos	61485	97.95
Columbia	48480	98.16
Lincoln	44575	96.18
Clatsop	35935	96.13
Malheur	27975	91.57
Union	25120	97.57
Tillamook	24455	96.17
Wasco	23900	93.76
Curry	22020	98.57
Jefferson	21100	95.65
Crook	20710	98.83
Hood River	19955	87.71
Baker	15865	98.85
Morrow	9785	87.33
Lake	7635	97.39
Grant	7240	99.52
Harney	7150	98.89
Wallowa	6820	99.49
Gilliam	1860	98.67
Sherman	1740	96.94
Wheeler	1340	99.26