Ranking of California Counties By Percentage of Hispanic or Latino of All Races 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 percentage of the California Hispanic or Latino of All Races population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 32.96%. Among all California counties, Sierra County had the highest percentage of its Hispanic or Latino of All Races population (aged 25 years and above) with an educational attainment of Less than High School Diploma (56.82%), followed by Lassen County (48.95%), and Monterey County (46.68%).

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 Hispanic or Latino of All Races Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
Sierra County
Lassen County
Monterey County
Mono County
Glenn County
Madera County
Colusa County
Del Norte County
Modoc County
Kings County
Ranking of California Counties By Percentage of Hispanic or Latino of All Races Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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Rank County Percentage of Population (Aged 25yrs+) (%)
1 Sierra County 56.82
2 Lassen County 48.95
3 Monterey County 46.68
4 Mono County 46.04
5 Glenn County 45.89
6 Madera County 45.24
7 Colusa County 44.13
8 Del Norte County 43.16
9 Modoc County 42.98
10 Kings County 42.37
11 Merced County 42.09
12 Napa County 41.27
13 Santa Barbara County 39.91
14 Tulare County 39.33
15 Kern County 38.49
16 Tehama County 37.79
17 Sutter County 37.12
18 Yuba County 37.06
19 Los Angeles County 36.26
20 Mendocino County 36.10
21 Fresno County 34.83
22 Santa Cruz County 34.40
23 Sonoma County 33.89
24 Stanislaus County 33.73
25 San Joaquin County 33.67
26 Imperial County 33.64
27 Lake County 33.62
28 Marin County 32.51
29 Ventura County 32.11
30 Orange County 31.72
31 Riverside County 30.47
32 San Bernardino County 29.66
33 Yolo County 29.04
34 Contra Costa County 28.81
35 Santa Clara County 28.23
36 Alameda County 27.75
37 San Diego County 26.95
38 San Benito County 26.77
39 Solano County 26.35
40 Inyo County 25.84
41 San Mateo County 25.83
42 Siskiyou County 25.30
43 Calaveras County 24.70
44 San Luis Obispo County 24.09
45 Sacramento County 23.99
46 Butte County 22.84
47 San Francisco County 20.79
48 Amador County 20.77
49 Tuolumne County 20.47
50 El Dorado County 19.22
51 Shasta County 19.21
52 Humboldt County 17.65
53 Nevada County 17.20
54 Mariposa County 16.46
55 Alpine County 15.46
56 Placer County 14.77
57 Trinity County 11.87
58 Plumas County 11.59