Ranking of Maryland Counties By Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent 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 High School Graduate or Equivalent was 1,014,292. Among all Maryland counties, Prince George's County had the highest population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (166,067), followed by Baltimore County (146,153), and Baltimore city (116,662).
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 High School Graduate or Equivalent in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Prince George's County | 166067 |
| 2 | Baltimore County | 146153 |
| 3 | Baltimore city | 116662 |
| 4 | Montgomery County | 95734 |
| 5 | Anne Arundel County | 90783 |
| 6 | Harford County | 47168 |
| 7 | Frederick County | 43666 |
| 8 | Washington County | 39055 |
| 9 | Carroll County | 33819 |
| 10 | Charles County | 33092 |
| 11 | Howard County | 28642 |
| 12 | Cecil County | 25478 |
| 13 | St. Mary's County | 23515 |
| 14 | Wicomico County | 20614 |
| 15 | Allegany County | 19630 |
| 16 | Calvert County | 18283 |
| 17 | Worcester County | 11941 |
| 18 | Queen Anne's County | 9890 |
| 19 | Dorchester County | 9207 |
| 20 | Garrett County | 8980 |
| 21 | Caroline County | 8928 |
| 22 | Talbot County | 6540 |
| 23 | Somerset County | 6068 |
| 24 | Kent County | 4377 |