Ranking of Montana Counties By White Alone Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)
Updated on September 5, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the Montana White Alone population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 33,223. Among all Montana counties, Yellowstone County had the highest White Alone population (aged 25 years and above) with an educational attainment of Less than High School Diploma (4,662), followed by Flathead County (3,396), and Cascade County (3,111).
The chart below shows the top 10 Montana counties, and the table below shows the ranking of all Montana counties.
You can see similar information for other educational attainments, and for other races and ethnicities.
You can also see similar information for other states and for the United States.
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Related Topics: Montana ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Montana Counties By White Alone Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Yellowstone County | 4662 |
| 2 | Flathead County | 3396 |
| 3 | Cascade County | 3111 |
| 4 | Missoula County | 2433 |
| 5 | Ravalli County | 2155 |
| 6 | Lewis and Clark County | 1882 |
| 7 | Gallatin County | 1603 |
| 8 | Silver Bow County | 1347 |
| 9 | Lincoln County | 1199 |
| 10 | Lake County | 848 |
| 11 | Sanders County | 730 |
| 12 | Deer Lodge County | 635 |
| 13 | Hill County | 481 |
| 14 | Jefferson County | 446 |
| 15 | Powell County | 434 |
| 16 | Stillwater County | 421 |
| 17 | Park County | 420 |
| 18 | Custer County | 410 |
| 19 | Liberty County | 376 |
| 20 | Carbon County | 342 |
| 21 | Toole County | 337 |
| 22 | Fergus County | 329 |
| 23 | Beaverhead County | 324 |
| 24 | Rosebud County | 307 |
| 25 | Dawson County | 300 |
| 26 | Musselshell County | 287 |
| 27 | Richland County | 282 |
| 28 | Teton County | 278 |
| 29 | Valley County | 269 |
| 30 | Broadwater County | 268 |
| 31 | Madison County | 240 |
| 32 | Pondera County | 230 |
| 33 | Mineral County | 224 |
| 34 | Granite County | 218 |
| 35 | Phillips County | 199 |
| 36 | Sheridan County | 183 |
| 37 | Big Horn County | 154 |
| 38 | Glacier County | 141 |
| 39 | Wheatland County | 139 |
| 40 | Blaine County | 137 |
| 41 | Chouteau County | 118 |
| 42 | Roosevelt County | 113 |
| 43 | Prairie County | 104 |
| 44 | Daniels County | 88 |
| 45 | Sweet Grass County | 80 |
| 46 | Carter County | 79 |
| 47 | Fallon County | 78 |
| 48 | Powder River County | 68 |
| 49 | Judith Basin County | 59 |
| 50 | McCone County | 53 |
| 50 | Wibaux County | 53 |
| 51 | Meagher County | 51 |
| 52 | Golden Valley County | 42 |
| 52 | Treasure County | 42 |
| 53 | Garfield County | 16 |
| 54 | Petroleum County | 2 |