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

Updated on February 28, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the total population of Oregon was 4.21M. Among all Oregon counties, Multnomah was the most populated county (810.01K), followed by Washington (596.97K), and then Clackamas (418.58K).

On the other hand, the least populated counties were: Wheeler (1.48K), Sherman (1.78K), and Gilliam (1.95K).

The chart and table below shows the population of each county and the percentage of Oregon population in each county.

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

Related Topics: Oregon ACS-5Yrs Estimates, 2021 Topic List.

Data Source: US Census - ACS 5-Year Estimates, 2021 Census.

Oregon Population By County in 2021

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County	Population	% of State Population
Baker	16539	0.39
Benton	94667	2.25
Clackamas	418577	9.95
Clatsop	40720	0.97
Columbia	52381	1.25
Coos	64619	1.54
Crook	24300	0.58
Curry	23234	0.55
Deschutes	194964	4.63
Douglas	110680	2.63
Gilliam	1954	0.05
Grant	7225	0.17
Harney	7454	0.18
Hood River	23915	0.57
Jackson	221662	5.27
Jefferson	24232	0.58
Josephine	87686	2.08
Klamath	68899	1.64
Lake	8119	0.19
Lane	380532	9.05
Lincoln	49866	1.19
Linn	127200	3.02
Malheur	31313	0.74
Marion	344037	8.18
Morrow	11964	0.28
Multnomah	810011	19.25
Polk	86347	2.05
Sherman	1784	0.04
Tillamook	27129	0.65
Umatilla	79509	1.89
Union	26255	0.62
Wallowa	7330	0.17
Wasco	26603	0.63
Washington	596969	14.19
Wheeler	1477	0.04
Yamhill	107024	2.54