Data / Rankings / Graduate or professional degree, population 25 and over / Counties in Washington

Counties in Washington by graduate or professional degree, population 25 and over

Whitman County had the highest graduate or professional degree, population 25 and over of 39 counties in 2021, at 22.6%. Grant County had the lowest, at 5.1%. The median was 10.4% and the figure for Washington was 14.2%. Source: the U.S. Census Bureau.

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Highest22.6Whitman County
Lowest5.1Grant County
Median10.439 counties
Washington14.2History

Map of counties, 2021

Adams County: 5.8 %Asotin County: 8.5 %Benton County: 12.6 %Chelan County: 10.3 %Clallam County: 11.9 %Clark County: 11.4 %Columbia County: 10.9 %Cowlitz County: 5.7 %Douglas County: 7 %Ferry County: 6.4 %Franklin County: 7.3 %Garfield County: 10.5 %Grant County: 5.1 %Grays Harbor County: 6.1 %Island County: 14.1 %Jefferson County: 18.8 %King County: 22.1 %Kitsap County: 12.2 %Kittitas County: 12 %Klickitat County: 12.7 %Lewis County: 6.9 %Lincoln County: 8.3 %Mason County: 6.1 %Okanogan County: 7.7 %Pacific County: 7.5 %Pend Oreille County: 7.5 %Pierce County: 9.9 %San Juan County: 22.1 %Skagit County: 10.4 %Skamania County: 10.6 %Snohomish County: 11.2 %Spokane County: 11.3 %Stevens County: 8.6 %Thurston County: 13.8 %Wahkiakum County: 8.8 %Walla Walla County: 12 %Whatcom County: 14 %Whitman County: 22.6 %Yakima County: 6.6 %
  • Under 6.7
  • 6.7 to 8.1
  • 8.1 to 10
  • 10 to 12
  • 12 to 13
  • 13 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Whitman County: 22.6 %Whitman County22.6San Juan County: 22.1 %San Juan County22.1King County: 22.1 %King County22.1Jefferson County: 18.8 %Jefferson County18.8Island County: 14.1 %Island County14.1Whatcom County: 14 %Whatcom County14Thurston County: 13.8 %Thurston County13.8Klickitat County: 12.7 %Klickitat County12.7Benton County: 12.6 %Benton County12.6Kitsap County: 12.2 %Kitsap County12.2Kittitas County: 12 %Kittitas County12Walla Walla County: 12 %Walla Walla County12Clallam County: 11.9 %Clallam County11.9Clark County: 11.4 %Clark County11.4Spokane County: 11.3 %Spokane County11.3Snohomish County: 11.2 %Snohomish County11.2Columbia County: 10.9 %Columbia County10.9Skamania County: 10.6 %Skamania County10.6Garfield County: 10.5 %Garfield County10.5Skagit County: 10.4 %Skagit County10.4Chelan County: 10.3 %Chelan County10.3Pierce County: 9.9 %Pierce County9.9Wahkiakum County: 8.8 %Wahkiakum County8.8Stevens County: 8.6 %Stevens County8.6Asotin County: 8.5 %Asotin County8.5Lincoln County: 8.3 %Lincoln County8.3Okanogan County: 7.7 %Okanogan County7.7Pacific County: 7.5 %Pacific County7.5Pend Oreille County: 7.5 %Pend Oreille County7.5Franklin County: 7.3 %Franklin County7.3Douglas County: 7 %Douglas County7Lewis County: 6.9 %Lewis County6.9Yakima County: 6.6 %Yakima County6.6Ferry County: 6.4 %Ferry County6.4Grays Harbor County: 6.1 %Grays Harbor County6.1Mason County: 6.1 %Mason County6.1Adams County: 5.8 %Adams County5.8Cowlitz County: 5.7 %Cowlitz County5.7Grant County: 5.1 %Grant County5.1Whitman County: 22.6 %Whitman County22.6San Juan County: 22.1 %San Juan County22.1King County: 22.1 %King County22.1Jefferson County: 18.8 %Jefferson County18.8Island County: 14.1 %Island County14.1Whatcom County: 14 %Whatcom County14Thurston County: 13.8 %Thurston County13.8Klickitat County: 12.7 %Klickitat County12.7Benton County: 12.6 %Benton County12.6Kitsap County: 12.2 %Kitsap County12.2Kittitas County: 12 %Kittitas County12Walla Walla County: 12 %Walla Walla County12Clallam County: 11.9 %Clallam County11.9Clark County: 11.4 %Clark County11.4Spokane County: 11.3 %Spokane County11.3Snohomish County: 11.2 %Snohomish County11.2Columbia County: 10.9 %Columbia County10.9Skamania County: 10.6 %Skamania County10.6Garfield County: 10.5 %Garfield County10.5Skagit County: 10.4 %Skagit County10.4Chelan County: 10.3 %Chelan County10.3Pierce County: 9.9 %Pierce County9.9Wahkiakum County: 8.8 %Wahkiakum County8.8Stevens County: 8.6 %Stevens County8.6Asotin County: 8.5 %Asotin County8.5Lincoln County: 8.3 %Lincoln County8.3Okanogan County: 7.7 %Okanogan County7.7Pacific County: 7.5 %Pacific County7.5Pend Oreille County: 7.5 %Pend Oreille County7.5Franklin County: 7.3 %Franklin County7.3Douglas County: 7 %Douglas County7Lewis County: 6.9 %Lewis County6.9Yakima County: 6.6 %Yakima County6.6Ferry County: 6.4 %Ferry County6.4Grays Harbor County: 6.1 %Grays Harbor County6.1Mason County: 6.1 %Mason County6.1Adams County: 5.8 %Adams County5.8Cowlitz County: 5.7 %Cowlitz County5.7Grant County: 5.1 %Grant County5.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Whitman County22.6
2San Juan County22.1
3King County22.1
4Jefferson County18.8
5Island County14.1
6Whatcom County14
7Thurston County13.8
8Klickitat County12.7
9Benton County12.6
10Kitsap County12.2
11Kittitas County12
12Walla Walla County12
13Clallam County11.9
14Clark County11.4
15Spokane County11.3
16Snohomish County11.2
17Columbia County10.9
18Skamania County10.6
19Garfield County10.5
20Skagit County10.4
21Chelan County10.3
22Pierce County9.9
23Wahkiakum County8.8
24Stevens County8.6
25Asotin County8.5
26Lincoln County8.3
27Okanogan County7.7
28Pacific County7.5
29Pend Oreille County7.5
30Franklin County7.3
31Douglas County7
32Lewis County6.9
33Yakima County6.6
34Ferry County6.4
35Grays Harbor County6.1
36Mason County6.1
37Adams County5.8
38Cowlitz County5.7
39Grant County5.1

Other periods

About this ranking

People aged 25 and over whose highest degree is a master's, professional school or doctorate degree, as a percentage of all people aged 25 and over. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

A subset of bachelors_degree_share, which also counts people whose highest degree is a bachelor's.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs (Counties in Washington by graduate or professional degree, population 25 and over, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat

MLA 9

American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Washington by graduate or professional degree, population 25 and over, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/washington-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. Counties in Washington by graduate or professional degree, population 25 and over, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Also distributed by Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/washington-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Washington by graduate or professional degree, population 25 and over, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat, via Invokely: https://invokely.ai/rankings/graduate-or-professional-degree/washington-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_washington_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Washington by graduate or professional degree, population 25 and over, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/washington-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Washington by graduate or professional degree, population 25 and over, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat
L2  - https://invokely.ai/rankings/graduate-or-professional-degree/washington-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/washington-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b15003.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest graduate or professional degree, population 25 and over?

Whitman County, with 22.6% in 2021, according to the U.S. Census Bureau.

Which county has the lowest graduate or professional degree, population 25 and over?

Grant County, with 5.1% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B15003: population 25 years and over with a master's, professional school or doctorate degree as a percentage of the population 25 years and over, calculated with stored inputs. Retrieved 2026-10-12.

Graduate or professional degree, population 25 and over: other rankings

Counties in Washington: more rankings