Ranking of Montana Counties By Non-Hispanic White Alone Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)

Updated on September 5, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the Montana Non-Hispanic White Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 181,448. Among all Montana counties, Yellowstone County had the highest Non-Hispanic White Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (27,676), followed by Flathead County (19,258), and Cascade County (15,765).

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.

Ranking of Montana Counties By Non-Hispanic White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Yellowstone County
Flathead County
Cascade County
Missoula County
Gallatin County
Lewis and Clark County
Ravalli County
Silver Bow County
Lincoln County
Lake County
Ranking of Montana Counties By Non-Hispanic White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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Rank County Number of People
1 Yellowstone County 27676
2 Flathead County 19258
3 Cascade County 15765
4 Missoula County 14677
5 Gallatin County 12375
6 Lewis and Clark County 10472
7 Ravalli County 9167
8 Silver Bow County 7397
9 Lincoln County 5324
10 Lake County 3980
11 Sanders County 3374
12 Park County 3274
13 Richland County 2667
14 Deer Lodge County 2581
15 Fergus County 2551
16 Custer County 2321
17 Hill County 2271
18 Jefferson County 2194
19 Carbon County 2184
20 Powell County 2069
21 Stillwater County 1921
22 Madison County 1830
23 Dawson County 1789
24 Beaverhead County 1697
25 Valley County 1557
26 Teton County 1363
27 Chouteau County 1203
28 Musselshell County 1188
29 Broadwater County 1169
30 Mineral County 1097
31 Rosebud County 1095
32 Toole County 1079
33 Pondera County 1057
34 Glacier County 1032
35 Big Horn County 1024
36 Phillips County 886
37 Sheridan County 838
38 Sweet Grass County 811
39 Roosevelt County 720
40 Granite County 684
41 Fallon County 663
42 Blaine County 629
43 Wheatland County 609
44 Meagher County 438
45 McCone County 413
46 Powder River County 409
47 Daniels County 388
48 Judith Basin County 385
49 Carter County 308
50 Garfield County 279
51 Liberty County 276
52 Wibaux County 269
53 Prairie County 244
54 Golden Valley County 200
55 Treasure County 184
56 Petroleum County 137