Ranking of California Counties By Percentage of 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 percentage of the California Non-Hispanic White Alone population (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 17.98%. Among all California counties, Trinity County had the highest percentage of its Non-Hispanic White Alone population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (39.41%), followed by Colusa County (34.29%), and Modoc County (32.97%).

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 Non-Hispanic White Alone Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Trinity County
Colusa County
Modoc County
Lassen County
Del Norte County
Amador County
Imperial County
Glenn County
Calaveras County
Lake County
Ranking of California Counties By Percentage of 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 Percentage of Population (Aged 25yrs+) (%)
1 Trinity County 39.41
2 Colusa County 34.29
3 Modoc County 32.97
4 Lassen County 32.38
5 Del Norte County 31.72
6 Amador County 31.28
7 Imperial County 31.10
8 Glenn County 30.69
9 Calaveras County 30.50
10 Lake County 30.45
11 Stanislaus County 29.91
12 Tehama County 29.69
13 Merced County 29.02
14 Sierra County 28.79
15 San Joaquin County 28.56
16 Plumas County 28.02
17 Inyo County 27.68
17 Tulare County 27.68
18 Siskiyou County 26.95
19 Kern County 26.71
20 San Bernardino County 26.35
21 Kings County 26.26
22 Mendocino County 25.91
23 Shasta County 25.85
24 Madera County 25.81
25 Sutter County 25.69
26 Riverside County 24.91
27 Tuolumne County 24.00
28 Yuba County 23.55
29 Mariposa County 22.81
30 Solano County 22.57
31 Humboldt County 22.56
32 Butte County 21.76
33 Sacramento County 21.41
34 El Dorado County 21.22
35 San Benito County 21.19
36 Fresno County 20.63
37 Mono County 20.06
38 Nevada County 18.74
39 San Luis Obispo County 18.23
40 Placer County 17.90
41 Alpine County 17.63
42 Sonoma County 16.97
43 Ventura County 16.60
44 Monterey County 16.39
45 Napa County 16.38
46 Los Angeles County 15.66
47 Contra Costa County 15.40
48 San Diego County 15.38
49 Orange County 14.98
50 Yolo County 14.48
51 Santa Cruz County 13.90
52 Santa Barbara County 13.68
53 Alameda County 12.85
54 Santa Clara County 11.74
55 San Mateo County 11.45
56 Marin County 8.32
57 San Francisco County 5.68