Ranking of US States 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 2, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the US population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 11.13%. Among all US states and DC, California had the highest percentage of its population (aged 25 years and above) with an educational attainment of Less than High School Diploma (15.81%), followed by Texas (15.18%), and Mississippi (14.36%).
The chart below shows the top 10 states, and the table below shows the ranking of all states and DC.
You can see similar information for other educational attainments.
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Related Topics: US Census 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of US States By Percentage of Population (Aged 25yrs+)
with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | State | Percentage of Population (Aged 25yrs+) (%) |
|---|---|---|
| 1 | California | 15.81 |
| 2 | Texas | 15.18 |
| 3 | Mississippi | 14.36 |
| 4 | Louisiana | 13.77 |
| 5 | New Mexico | 13.23 |
| 6 | Nevada | 12.98 |
| 7 | Alabama | 12.60 |
| 8 | New York | 12.57 |
| 9 | Kentucky | 12.35 |
| 10 | Arkansas | 12.31 |
| 11 | West Virginia | 11.94 |
| 12 | Georgia | 11.76 |
| 13 | Arizona | 11.70 |
| 14 | Oklahoma | 11.25 |
| 15 | Tennessee | 11.24 |
| 16 | South Carolina | 11.22 |
| 17 | Florida | 10.96 |
| 17 | North Carolina | 10.96 |
| 18 | Rhode Island | 10.89 |
| 19 | Indiana | 10.23 |
| 20 | Illinois | 10.10 |
| 21 | New Jersey | 9.50 |
| 22 | Maryland | 9.23 |
| 23 | Virginia | 9.17 |
| 24 | Missouri | 9.02 |
| 25 | Connecticut | 8.95 |
| 25 | Delaware | 8.95 |
| 26 | Ohio | 8.86 |
| 27 | Massachusetts | 8.84 |
| 28 | Idaho | 8.83 |
| 29 | Pennsylvania | 8.64 |
| 30 | Oregon | 8.50 |
| 31 | Michigan | 8.42 |
| 32 | Kansas | 8.39 |
| 33 | Nebraska | 8.28 |
| 34 | Washington | 8.08 |
| 35 | District of Columbia | 7.78 |
| 36 | Colorado | 7.64 |
| 37 | South Dakota | 7.47 |
| 38 | Hawaii | 7.30 |
| 39 | Iowa | 7.19 |
| 40 | Wisconsin | 7.08 |
| 41 | Utah | 6.90 |
| 42 | Alaska | 6.74 |
| 43 | North Dakota | 6.71 |
| 44 | Minnesota | 6.44 |
| 45 | New Hampshire | 6.37 |
| 46 | Maine | 6.29 |
| 47 | Wyoming | 6.26 |
| 48 | Vermont | 6.14 |
| 49 | Montana | 5.65 |