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

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

Fallon County had the highest high school graduate or higher, population 25 and over of 56 counties in 2024, at 99.6%. Liberty County had the lowest, at 83.8%. The median was 93.6% and the figure for Montana was 94.6%. Source: the U.S. Census Bureau.

Highest99.6Fallon County
Lowest83.8Liberty County
Median93.656 counties
Montana94.6History

All counties, 2024

Fallon County: 99.6 %Fallon County99.6Petroleum County: 98.9 %Petroleum County98.9McCone County: 97.7 %McCone County97.7Gallatin County: 97.2 %Gallatin County97.2Sweet Grass County: 97.1 %Sweet Grass County97.1Missoula County: 96.6 %Missoula County96.6Carbon County: 96.6 %Carbon County96.6Park County: 96.5 %Park County96.5Prairie County: 96.5 %Prairie County96.5Garfield County: 96.2 %Garfield County96.2Wibaux County: 96 %Wibaux County96Custer County: 95.7 %Custer County95.7Stillwater County: 95.6 %Stillwater County95.6Yellowstone County: 95.5 %Yellowstone County95.5Flathead County: 95.5 %Flathead County95.5Fergus County: 95.1 %Fergus County95.1Phillips County: 95.1 %Phillips County95.1Richland County: 95.1 %Richland County95.1Treasure County: 95 %Treasure County95Lewis and Clark County: 94.9 %Lewis and Clark County94.9Valley County: 94.7 %Valley County94.7Daniels County: 94.7 %Daniels County94.7Cascade County: 94.4 %Cascade County94.4Silver Bow County: 94 %Silver Bow County94Jefferson County: 93.9 %Jefferson County93.9Madison County: 93.9 %Madison County93.9Carter County: 93.7 %Carter County93.7Granite County: 93.6 %Granite County93.6Wheatland County: 93.6 %Wheatland County93.6Powell County: 93.6 %Powell County93.6Chouteau County: 93.5 %Chouteau County93.5Ravalli County: 93.4 %Ravalli County93.4Judith Basin County: 93.2 %Judith Basin County93.2Dawson County: 93.1 %Dawson County93.1Lake County: 92.9 %Lake County92.9Mineral County: 92.7 %Mineral County92.7Beaverhead County: 92.7 %Beaverhead County92.7Deer Lodge County: 92.4 %Deer Lodge County92.4Meagher County: 91.8 %Meagher County91.8Sanders County: 91.7 %Sanders County91.7Broadwater County: 91.7 %Broadwater County91.7Teton County: 91.6 %Teton County91.6Roosevelt County: 91.5 %Roosevelt County91.5Hill County: 90.9 %Hill County90.9Blaine County: 90.7 %Blaine County90.7Rosebud County: 90.7 %Rosebud County90.7Sheridan County: 90.7 %Sheridan County90.7Powder River County: 90.6 %Powder River County90.6Lincoln County: 90.5 %Lincoln County90.5Big Horn County: 89.7 %Big Horn County89.7Musselshell County: 89.3 %Musselshell County89.3Pondera County: 87.1 %Pondera County87.1Golden Valley County: 86.5 %Golden Valley County86.5Toole County: 86.3 %Toole County86.3Glacier County: 85 %Glacier County85Liberty County: 83.8 %Liberty County83.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Fallon County99.6+2.7 pts
2Petroleum County98.9+0.1 pts
3McCone County97.7+1.2 pts
4Gallatin County97.20 pts
5Sweet Grass County97.1+0.7 pts
6Missoula County96.60 pts
7Carbon County96.6-0.1 pts
8Park County96.5-0.2 pts
9Prairie County96.5+8 pts
10Garfield County96.2-0.2 pts
11Wibaux County96-1.4 pts
12Custer County95.7+1 pts
13Stillwater County95.6+2.5 pts
14Yellowstone County95.5+0.3 pts
15Flathead County95.5-0.1 pts
16Fergus County95.1+0.9 pts
17Phillips County95.1-0.3 pts
18Richland County95.1-1.2 pts
19Treasure County95+0.1 pts
20Lewis and Clark County94.90 pts
21Valley County94.7+0.1 pts
22Daniels County94.7-2 pts
23Cascade County94.4+0.5 pts
24Silver Bow County940 pts
25Jefferson County93.9-0 pts
26Madison County93.9-1.5 pts
27Carter County93.7+0.3 pts
28Granite County93.6+0.7 pts
29Wheatland County93.6+1 pts
30Powell County93.6+0.4 pts
31Chouteau County93.5+1.2 pts
32Ravalli County93.4+0.2 pts
33Judith Basin County93.2-0.9 pts
34Dawson County93.1-1.2 pts
35Lake County92.9-0.1 pts
36Mineral County92.7-0.6 pts
37Beaverhead County92.7-0.3 pts
38Deer Lodge County92.4-0.4 pts
39Meagher County91.8-3.7 pts
40Sanders County91.7-0.5 pts
41Broadwater County91.7+0.7 pts
42Teton County91.6+0.6 pts
43Roosevelt County91.5-0.3 pts
44Hill County90.9-0.3 pts
45Blaine County90.7+0.2 pts
46Rosebud County90.7-0.7 pts
47Sheridan County90.7-0.8 pts
48Powder River County90.6+1 pts
49Lincoln County90.5-1.4 pts
50Big Horn County89.7+1.2 pts
51Musselshell County89.3-1.1 pts
52Pondera County87.1+0.3 pts
53Golden Valley County86.5-2.6 pts
54Toole County86.3+0.1 pts
55Glacier County85-0.6 pts
56Liberty County83.8+2.7 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 Montana 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 Montana 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/montana-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 Montana 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/montana-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 Montana 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/montana-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_montana_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 Montana 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/montana-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 Montana 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/montana-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/montana-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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Questions

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

Fallon County, with 99.6% in 2024, according to the U.S. Census Bureau.

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

Liberty County, with 83.8% 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 Montana: more rankings