Ranking of Montana Counties By Percentage of 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 percentage of the Montana White Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 27.64%. Among all Montana counties, Petroleum County had the highest percentage of its White Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (44.77%), followed by Powell County (42.52%), and Garfield County (42.02%).

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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Ranking of Montana Counties By White Alone Population with Educational Attainment of High School Graduate or Equivalent in 2021
Ranking of Montana Counties By Percentage of Population with Educational Attainment of High School Graduate or Equivalent in 2021

Related Topics: Montana ACS-5Yrs Estimates, 2021 Topic List.

Data Source: US Census - ACS 5-Year Estimates.

Ranking of Montana Counties By Percentage of White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021

Petroleum County

Powell County

Garfield County

Wibaux County

Wheatland County

Glacier County

Sanders County

Big Horn County

Richland County

Deer Lodge County

Ranking of Montana Counties By Percentage of White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021

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Rank	County	Percentage of Population (Aged 25yrs+) (%)
1	Petroleum County	44.77
2	Powell County	42.52
3	Garfield County	42.02
4	Wibaux County	40.29
5	Wheatland County	40.07
6	Glacier County	39.42
7	Sanders County	39.16
8	Big Horn County	38.60
9	Richland County	38.53
10	Deer Lodge County	37.92
11	Lincoln County	37.77
12	Golden Valley County	36.77
13	Chouteau County	36.46
14	Musselshell County	35.90
15	Fallon County	35.06
16	Sheridan County	34.98
16	Toole County	34.98
17	Teton County	34.41
18	Mineral County	34.39
19	Phillips County	34.35
20	Silver Bow County	34.12
21	Treasure County	33.95
22	Rosebud County	33.42
23	Valley County	33.06
24	Powder River County	32.96
25	Sweet Grass County	32.92
26	Fergus County	32.54
27	Daniels County	32.50
28	McCone County	32.46
29	Meagher County	31.90
30	Stillwater County	31.62
31	Cascade County	31.42
32	Carter County	30.65
33	Pondera County	30.33
34	Ravalli County	30.26
35	Dawson County	30.14
35	Hill County	30.14
36	Carbon County	29.43
37	Custer County	29.38
38	Blaine County	29.17
39	Madison County	28.62
40	Judith Basin County	28.42
41	Beaverhead County	28.41
42	Granite County	28.25
43	Flathead County	28.06
44	Prairie County	27.82
45	Yellowstone County	27.80
46	Roosevelt County	27.40
47	Broadwater County	27.07
48	Park County	26.67
49	Jefferson County	26.62
50	Lake County	25.91
51	Lewis and Clark County	23.06
52	Missoula County	20.45
53	Liberty County	20.07
54	Gallatin County	18.08