Ranking of Maryland Counties By 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 population of Maryland (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 391,353. Among all Maryland counties, Prince George's County had the highest population (aged 25 years and above) with an educational attainment of Less than High School Diploma (83,413), followed by Montgomery County (63,938), and Baltimore city (56,716).
The chart below shows the top 10 Maryland counties, and the table below shows the ranking of all Maryland 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: Maryland ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Maryland Counties By Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Prince George's County | 83413 |
| 2 | Montgomery County | 63938 |
| 3 | Baltimore city | 56716 |
| 4 | Baltimore County | 49577 |
| 5 | Anne Arundel County | 26594 |
| 6 | Frederick County | 12892 |
| 7 | Washington County | 12860 |
| 8 | Harford County | 11297 |
| 9 | Howard County | 10307 |
| 10 | Wicomico County | 7957 |
| 11 | Carroll County | 7445 |
| 12 | Charles County | 7043 |
| 13 | Cecil County | 6595 |
| 14 | St. Mary's County | 6268 |
| 15 | Allegany County | 4682 |
| 16 | Calvert County | 3476 |
| 17 | Caroline County | 3434 |
| 18 | Dorchester County | 2927 |
| 19 | Worcester County | 2875 |
| 20 | Somerset County | 2791 |
| 21 | Queen Anne's County | 2536 |
| 22 | Talbot County | 2374 |
| 23 | Garrett County | 2059 |
| 24 | Kent County | 1297 |