Data / Rankings / High school graduate or higher, population 25 and over / Counties in Idaho

Counties in Idaho by high school graduate or higher, population 25 and over, 2024

Madison County had the highest high school graduate or higher, population 25 and over of 44 counties in 2024, at 97.3%. Jerome County had the lowest, at 73.5%. The median was 90.9% and the figure for Idaho was 91.9%. Source: the U.S. Census Bureau.

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Highest97.3Madison County
Lowest73.5Jerome County
Median90.944 counties
Idaho91.9History

Map of counties, 2024

Ada County: 95.2 %Adams County: 92.9 %Bannock County: 93.7 %Bear Lake County: 92.4 %Benewah County: 87.6 %Bingham County: 88.9 %Blaine County: 91.5 %Boise County: 95.9 %Bonner County: 92.3 %Bonneville County: 91.9 %Boundary County: 86.1 %Butte County: 89.1 %Camas County: 87 %Canyon County: 87.7 %Caribou County: 91 %Cassia County: 85.4 %Clark County: 74.4 %Clearwater County: 92 %Custer County: 93.9 %Elmore County: 88 %Franklin County: 95.7 %Fremont County: 90.8 %Gem County: 89.5 %Gooding County: 80.8 %Idaho County: 91.9 %Jefferson County: 93.3 %Jerome County: 73.5 %Kootenai County: 94.7 %Latah County: 96.5 %Lemhi County: 90.8 %Lewis County: 91.4 %Lincoln County: 84 %Madison County: 97.3 %Minidoka County: 83.1 %Nez Perce County: 93.8 %Oneida County: 95.7 %Owyhee County: 78.2 %Payette County: 86.2 %Power County: 87.8 %Shoshone County: 89.9 %Teton County: 92.5 %Twin Falls County: 89.3 %Valley County: 91 %Washington County: 89.6 %
  • Under 86
  • 86 to 89
  • 89 to 91
  • 91 to 92
  • 92 to 94
  • 94 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2024

Madison County: 97.3 %Madison County97.3Latah County: 96.5 %Latah County96.5Boise County: 95.9 %Boise County95.9Oneida County: 95.7 %Oneida County95.7Franklin County: 95.7 %Franklin County95.7Ada County: 95.2 %Ada County95.2Kootenai County: 94.7 %Kootenai County94.7Custer County: 93.9 %Custer County93.9Nez Perce County: 93.8 %Nez Perce County93.8Bannock County: 93.7 %Bannock County93.7Jefferson County: 93.3 %Jefferson County93.3Adams County: 92.9 %Adams County92.9Teton County: 92.5 %Teton County92.5Bear Lake County: 92.4 %Bear Lake County92.4Bonner County: 92.3 %Bonner County92.3Clearwater County: 92 %Clearwater County92Bonneville County: 91.9 %Bonneville County91.9Idaho County: 91.9 %Idaho County91.9Blaine County: 91.5 %Blaine County91.5Lewis County: 91.4 %Lewis County91.4Caribou County: 91 %Caribou County91Valley County: 91 %Valley County91Fremont County: 90.8 %Fremont County90.8Lemhi County: 90.8 %Lemhi County90.8Shoshone County: 89.9 %Shoshone County89.9Washington County: 89.6 %Washington County89.6Gem County: 89.5 %Gem County89.5Twin Falls County: 89.3 %Twin Falls County89.3Butte County: 89.1 %Butte County89.1Bingham County: 88.9 %Bingham County88.9Elmore County: 88 %Elmore County88Power County: 87.8 %Power County87.8Canyon County: 87.7 %Canyon County87.7Benewah County: 87.6 %Benewah County87.6Camas County: 87 %Camas County87Payette County: 86.2 %Payette County86.2Boundary County: 86.1 %Boundary County86.1Cassia County: 85.4 %Cassia County85.4Lincoln County: 84 %Lincoln County84Minidoka County: 83.1 %Minidoka County83.1Gooding County: 80.8 %Gooding County80.8Owyhee County: 78.2 %Owyhee County78.2Clark County: 74.4 %Clark County74.4Jerome County: 73.5 %Jerome County73.5Madison County: 97.3 %Madison County97.3Latah County: 96.5 %Latah County96.5Boise County: 95.9 %Boise County95.9Oneida County: 95.7 %Oneida County95.7Franklin County: 95.7 %Franklin County95.7Ada County: 95.2 %Ada County95.2Kootenai County: 94.7 %Kootenai County94.7Custer County: 93.9 %Custer County93.9Nez Perce County: 93.8 %Nez Perce County93.8Bannock County: 93.7 %Bannock County93.7Jefferson County: 93.3 %Jefferson County93.3Adams County: 92.9 %Adams County92.9Teton County: 92.5 %Teton County92.5Bear Lake County: 92.4 %Bear Lake County92.4Bonner County: 92.3 %Bonner County92.3Clearwater County: 92 %Clearwater County92Bonneville County: 91.9 %Bonneville County91.9Idaho County: 91.9 %Idaho County91.9Blaine County: 91.5 %Blaine County91.5Lewis County: 91.4 %Lewis County91.4Caribou County: 91 %Caribou County91Valley County: 91 %Valley County91Fremont County: 90.8 %Fremont County90.8Lemhi County: 90.8 %Lemhi County90.8Shoshone County: 89.9 %Shoshone County89.9Washington County: 89.6 %Washington County89.6Gem County: 89.5 %Gem County89.5Twin Falls County: 89.3 %Twin Falls County89.3Butte County: 89.1 %Butte County89.1Bingham County: 88.9 %Bingham County88.9Elmore County: 88 %Elmore County88Power County: 87.8 %Power County87.8Canyon County: 87.7 %Canyon County87.7Benewah County: 87.6 %Benewah County87.6Camas County: 87 %Camas County87Payette County: 86.2 %Payette County86.2Boundary County: 86.1 %Boundary County86.1Cassia County: 85.4 %Cassia County85.4Lincoln County: 84 %Lincoln County84Minidoka County: 83.1 %Minidoka County83.1Gooding County: 80.8 %Gooding County80.8Owyhee County: 78.2 %Owyhee County78.2Clark County: 74.4 %Clark County74.4Jerome County: 73.5 %Jerome County73.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Madison County97.3+0.2 pts
2Latah County96.5-0.5 pts
3Boise County95.9+0.3 pts
4Oneida County95.7+1.5 pts
5Franklin County95.7+1.6 pts
6Ada County95.2+0.1 pts
7Kootenai County94.7+0.4 pts
8Custer County93.9+0.3 pts
9Nez Perce County93.8+0.9 pts
10Bannock County93.7-0 pts
11Jefferson County93.3-0 pts
12Adams County92.9-0 pts
13Teton County92.5-0.1 pts
14Bear Lake County92.4-0.6 pts
15Bonner County92.3+0.7 pts
16Clearwater County92+0.9 pts
17Bonneville County91.9-0.1 pts
18Idaho County91.90 pts
19Blaine County91.5+0.3 pts
20Lewis County91.4+0.6 pts
21Caribou County91+0.4 pts
21Valley County91-0 pts
23Fremont County90.8+0.1 pts
24Lemhi County90.8-1.9 pts
25Shoshone County89.9+1.2 pts
26Washington County89.6+0.9 pts
27Gem County89.5+0.5 pts
28Twin Falls County89.3+0.6 pts
29Butte County89.1+1.5 pts
30Bingham County88.9-0.3 pts
31Elmore County88-0.2 pts
32Power County87.8-0.3 pts
33Canyon County87.70 pts
34Benewah County87.6+3.2 pts
35Camas County87+1 pts
36Payette County86.2-0.5 pts
37Boundary County86.1-1.1 pts
38Cassia County85.4-0 pts
39Lincoln County84+1.5 pts
40Minidoka County83.1+1 pts
41Gooding County80.8+1 pts
42Owyhee County78.2+0.5 pts
43Clark County74.4-1.4 pts
44Jerome County73.5+0.1 pts

Other periods

About this ranking

People aged 25 and over who hold a regular high school diploma, a GED or alternative credential, or any higher level of education, 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.

Measures the adult population, not students: it is not the high school graduation rate of a class. Not comparable with the EU share below upper secondary education, which covers ages 25 to 64.

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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs (Counties in Idaho by high school graduate or higher, population 25 and over, 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat

MLA 9

American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Idaho by high school graduate or higher, population 25 and over, 2024. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat. Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties. 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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Counties in Idaho by high school graduate or higher, population 25 and over, 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat. Also distributed by Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Idaho by high school graduate or higher, population 25 and over, 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat, via Invokely: https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_idaho_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Idaho by high school graduate or higher, population 25 and over, 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2024/table-based-SF/data/5YRData/acsdt5y2024-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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Idaho by high school graduate or higher, population 25 and over, 2024
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat
L2  - https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b15003.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Idaho by high school graduate or higher, population 25 and over using official data, and cite the source.
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Questions

Which county has the highest high school graduate or higher, population 25 and over?

Madison County, with 97.3% in 2024, according to the U.S. Census Bureau.

Which county has the lowest high school graduate or higher, population 25 and over?

Jerome County, with 73.5% in 2024.

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 high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Retrieved 2026-10-12.

High school graduate or higher, population 25 and over: other rankings

Counties in Idaho: more rankings