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.
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Related Topics: New Mexico ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
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 |