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

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

Latah County had the highest graduate or professional degree, population 25 and over of 44 counties in 2021, at 18.1%. Butte County had the lowest, at 2.5%. The median was 6% and the figure for Idaho was 9.6%. Source: the U.S. Census Bureau.

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Highest18.1Latah County
Lowest2.5Butte County
Median644 counties
Idaho9.6History

Map of counties, 2021

Ada County: 14.1 %Adams County: 6.9 %Bannock County: 9.3 %Bear Lake County: 5.8 %Benewah County: 4.8 %Bingham County: 6.2 %Blaine County: 12.5 %Boise County: 10.4 %Bonner County: 8.7 %Bonneville County: 10.1 %Boundary County: 4.4 %Butte County: 2.5 %Camas County: 7 %Canyon County: 6.1 %Caribou County: 5.9 %Cassia County: 5.1 %Clark County: 6.5 %Clearwater County: 5.6 %Custer County: 3.8 %Elmore County: 5.5 %Franklin County: 5.1 %Fremont County: 4.9 %Gem County: 5 %Gooding County: 5.2 %Idaho County: 5.4 %Jefferson County: 8.9 %Jerome County: 4.7 %Kootenai County: 8.8 %Latah County: 18.1 %Lemhi County: 7.4 %Lewis County: 6 %Lincoln County: 4.4 %Madison County: 9.8 %Minidoka County: 5.4 %Nez Perce County: 7.5 %Oneida County: 5.5 %Owyhee County: 3.1 %Payette County: 5.1 %Power County: 4.5 %Shoshone County: 4.4 %Teton County: 13 %Twin Falls County: 9.1 %Valley County: 11 %Washington County: 6.5 %
  • Under 4.7
  • 4.7 to 5.2
  • 5.2 to 6
  • 6 to 7.2
  • 7.2 to 9.7
  • 9.7 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Latah County: 18.1 %Latah County18.1Ada County: 14.1 %Ada County14.1Teton County: 13 %Teton County13Blaine County: 12.5 %Blaine County12.5Valley County: 11 %Valley County11Boise County: 10.4 %Boise County10.4Bonneville County: 10.1 %Bonneville County10.1Madison County: 9.8 %Madison County9.8Bannock County: 9.3 %Bannock County9.3Twin Falls County: 9.1 %Twin Falls County9.1Jefferson County: 8.9 %Jefferson County8.9Kootenai County: 8.8 %Kootenai County8.8Bonner County: 8.7 %Bonner County8.7Nez Perce County: 7.5 %Nez Perce County7.5Lemhi County: 7.4 %Lemhi County7.4Camas County: 7 %Camas County7Adams County: 6.9 %Adams County6.9Clark County: 6.5 %Clark County6.5Washington County: 6.5 %Washington County6.5Bingham County: 6.2 %Bingham County6.2Canyon County: 6.1 %Canyon County6.1Lewis County: 6 %Lewis County6Caribou County: 5.9 %Caribou County5.9Bear Lake County: 5.8 %Bear Lake County5.8Clearwater County: 5.6 %Clearwater County5.6Oneida County: 5.5 %Oneida County5.5Elmore County: 5.5 %Elmore County5.5Idaho County: 5.4 %Idaho County5.4Minidoka County: 5.4 %Minidoka County5.4Gooding County: 5.2 %Gooding County5.2Franklin County: 5.1 %Franklin County5.1Cassia County: 5.1 %Cassia County5.1Payette County: 5.1 %Payette County5.1Gem County: 5 %Gem County5Fremont County: 4.9 %Fremont County4.9Benewah County: 4.8 %Benewah County4.8Jerome County: 4.7 %Jerome County4.7Power County: 4.5 %Power County4.5Lincoln County: 4.4 %Lincoln County4.4Shoshone County: 4.4 %Shoshone County4.4Boundary County: 4.4 %Boundary County4.4Custer County: 3.8 %Custer County3.8Owyhee County: 3.1 %Owyhee County3.1Butte County: 2.5 %Butte County2.5Latah County: 18.1 %Latah County18.1Ada County: 14.1 %Ada County14.1Teton County: 13 %Teton County13Blaine County: 12.5 %Blaine County12.5Valley County: 11 %Valley County11Boise County: 10.4 %Boise County10.4Bonneville County: 10.1 %Bonneville County10.1Madison County: 9.8 %Madison County9.8Bannock County: 9.3 %Bannock County9.3Twin Falls County: 9.1 %Twin Falls County9.1Jefferson County: 8.9 %Jefferson County8.9Kootenai County: 8.8 %Kootenai County8.8Bonner County: 8.7 %Bonner County8.7Nez Perce County: 7.5 %Nez Perce County7.5Lemhi County: 7.4 %Lemhi County7.4Camas County: 7 %Camas County7Adams County: 6.9 %Adams County6.9Clark County: 6.5 %Clark County6.5Washington County: 6.5 %Washington County6.5Bingham County: 6.2 %Bingham County6.2Canyon County: 6.1 %Canyon County6.1Lewis County: 6 %Lewis County6Caribou County: 5.9 %Caribou County5.9Bear Lake County: 5.8 %Bear Lake County5.8Clearwater County: 5.6 %Clearwater County5.6Oneida County: 5.5 %Oneida County5.5Elmore County: 5.5 %Elmore County5.5Idaho County: 5.4 %Idaho County5.4Minidoka County: 5.4 %Minidoka County5.4Gooding County: 5.2 %Gooding County5.2Franklin County: 5.1 %Franklin County5.1Cassia County: 5.1 %Cassia County5.1Payette County: 5.1 %Payette County5.1Gem County: 5 %Gem County5Fremont County: 4.9 %Fremont County4.9Benewah County: 4.8 %Benewah County4.8Jerome County: 4.7 %Jerome County4.7Power County: 4.5 %Power County4.5Lincoln County: 4.4 %Lincoln County4.4Shoshone County: 4.4 %Shoshone County4.4Boundary County: 4.4 %Boundary County4.4Custer County: 3.8 %Custer County3.8Owyhee County: 3.1 %Owyhee County3.1Butte County: 2.5 %Butte County2.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Latah County18.1
2Ada County14.1
3Teton County13
4Blaine County12.5
5Valley County11
6Boise County10.4
7Bonneville County10.1
8Madison County9.8
9Bannock County9.3
10Twin Falls County9.1
11Jefferson County8.9
12Kootenai County8.8
13Bonner County8.7
14Nez Perce County7.5
15Lemhi County7.4
16Camas County7
17Adams County6.9
18Clark County6.5
19Washington County6.5
20Bingham County6.2
21Canyon County6.1
22Lewis County6
23Caribou County5.9
24Bear Lake County5.8
25Clearwater County5.6
26Oneida County5.5
27Elmore County5.5
28Idaho County5.4
29Minidoka County5.4
30Gooding County5.2
31Franklin County5.1
32Cassia County5.1
33Payette County5.1
34Gem County5
35Fremont County4.9
36Benewah County4.8
37Jerome County4.7
38Power County4.5
39Lincoln County4.4
40Shoshone County4.4
41Boundary County4.4
42Custer County3.8
43Owyhee County3.1
44Butte County2.5

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 Idaho 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 Idaho 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/idaho-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 Idaho 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/idaho-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 Idaho 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/idaho-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_idaho_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 Idaho 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/idaho-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 Idaho 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/idaho-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/graduate-or-professional-degree/idaho-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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Rank Counties in Idaho by graduate or professional degree, population 25 and over using official data, and cite the source.
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Questions

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

Latah County, with 18.1% in 2021, according to the U.S. Census Bureau.

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

Butte County, with 2.5% 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 Idaho: more rankings