Ranking of California Counties By Percentage of American Indian and Alaska Native 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 California American Indian and Alaska Native Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 26.87%. Among all California counties, Modoc County had the highest percentage of its American Indian and Alaska Native Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (58.82%), followed by San Benito County (48.58%), and Alpine County (45.15%).

The chart below shows the top 10 California counties, and the table below shows the ranking of all California 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 California Counties By Percentage of American Indian and Alaska Native Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Modoc County
San Benito County
Alpine County
Inyo County
Glenn County
Calaveras County
Mariposa County
Tuolumne County
Butte County
Mendocino County
Ranking of California Counties By Percentage of American Indian and Alaska Native 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 Modoc County 58.82
2 San Benito County 48.58
3 Alpine County 45.15
4 Inyo County 42.08
5 Glenn County 41.43
6 Calaveras County 39.68
7 Mariposa County 39.22
8 Tuolumne County 36.63
9 Butte County 35.76
10 Mendocino County 35.55
11 Santa Barbara County 34.82
12 Lassen County 34.32
13 Del Norte County 33.80
14 Tehama County 33.78
15 Lake County 33.76
16 El Dorado County 33.42
17 San Bernardino County 33.07
18 Solano County 32.21
19 Yolo County 32.13
20 Riverside County 31.44
21 Kern County 30.88
22 Sacramento County 29.60
23 Santa Cruz County 29.53
24 Sierra County 29.31
25 Trinity County 29.26
26 Alameda County 29.02
27 San Mateo County 28.69
28 Siskiyou County 28.45
29 Contra Costa County 28.44
30 Imperial County 28.33
31 Stanislaus County 27.74
32 San Joaquin County 27.66
33 San Diego County 27.59
34 Sonoma County 27.03
35 Amador County 26.79
36 Nevada County 26.49
37 Napa County 26.45
38 Humboldt County 25.41
39 Santa Clara County 25.21
40 Orange County 25.08
41 Fresno County 24.52
42 Kings County 24.33
43 Plumas County 24.06
44 Los Angeles County 23.37
45 Merced County 23.33
46 Shasta County 23.27
47 San Francisco County 22.93
48 Tulare County 22.39
49 Madera County 22.36
50 Marin County 22.22
51 Ventura County 21.50
52 Monterey County 21.49
53 San Luis Obispo County 20.13
54 Sutter County 20.06
55 Colusa County 20.00
56 Placer County 17.55
57 Yuba County 13.80
58 Mono County 13.40