Ranking of Oregon Counties By Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)

Updated on September 3, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the population of Oregon (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 668,083. Among all Oregon counties, Multnomah County had the highest population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (101,565), followed by Washington County (71,481), and Clackamas County (64,399).

The chart below shows the top 10 Oregon counties, and the table below shows the ranking of all Oregon counties.

You can see similar information for other educational attainments.

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

Ranking of Oregon Counties By Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Multnomah County
Washington County
Clackamas County
Lane County
Marion County
Jackson County
Deschutes County
Douglas County
Linn County
Josephine County
Ranking of Oregon Counties By Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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Rank County Number of People
1 Multnomah County 101565
2 Washington County 71481
3 Clackamas County 64399
4 Lane County 59763
5 Marion County 58589
6 Jackson County 40224
7 Deschutes County 28930
8 Douglas County 26143
9 Linn County 25556
10 Josephine County 19899
11 Yamhill County 17332
12 Klamath County 15812
13 Umatilla County 15548
14 Coos County 14537
15 Polk County 12871
16 Columbia County 12418
17 Lincoln County 9263
18 Benton County 8353
19 Clatsop County 8241
20 Malheur County 6423
21 Tillamook County 5995
22 Union County 5787
23 Crook County 5715
24 Curry County 5208
25 Wasco County 5035
26 Jefferson County 4914
27 Baker County 3599
28 Hood River County 3131
29 Morrow County 2521
30 Lake County 2056
31 Harney County 1987
32 Grant County 1977
33 Wallowa County 1574
34 Gilliam County 478
35 Sherman County 397
36 Wheeler County 362