Ranking of New Mexico Counties By Percentage of Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)

Updated on September 3, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the population of New Mexico (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 13.23%. Among all New Mexico counties, Luna County had the highest percentage of its population (aged 25 years and above) with an educational attainment of Less than High School Diploma (29.20%), followed by Lea County (23.77%), and McKinley County (20.88%).

The chart below shows the top 10 New Mexico counties, and the table below shows the ranking of all New Mexico counties.

You can see similar information for other educational attainments.

You can also see similar information for other states and for the United States.

Ranking of New Mexico Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
Luna County
Lea County
McKinley County
Chaves County
Curry County
Doña Ana County
De Baca County
Cibola County
Eddy County
Roosevelt County
Ranking of New Mexico Counties By Percentage of 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 Luna County 29.20
2 Lea County 23.77
3 McKinley County 20.88
4 Chaves County 20.11
5 Curry County 19.27
6 Doña Ana County 19.26
7 De Baca County 19.12
8 Cibola County 18.18
9 Eddy County 16.97
10 Roosevelt County 16.95
11 Hidalgo County 16.79
12 Guadalupe County 16.30
13 Socorro County 16.14
14 Quay County 15.77
15 Union County 15.65
16 San Miguel County 15.28
17 Valencia County 15.22
18 San Juan County 14.15
19 Rio Arriba County 13.73
20 Otero County 13.67
21 Harding County 13.40
22 Grant County 12.79
23 Torrance County 12.64
24 Sierra County 10.48
25 Colfax County 10.35
26 Santa Fe County 9.91
27 Lincoln County 9.88
28 Bernalillo County 9.71
29 Sandoval County 8.62
30 Mora County 8.13
31 Taos County 7.89
32 Catron County 5.16
33 Los Alamos County 1.82