| Rank | County | Percentage of Black or African American Residents | 
|---|---|---|
| 1 | Prince Georges County, Maryland | 65.3% | 
| 2 | Baltimore city, Maryland | 63.6% | 
| 3 | Charles County, Maryland | 42.4% | 
| 4 | Somerset County, Maryland | 42.4% | 
| 5 | Dorchester County, Maryland | 28.0% | 
| 6 | Baltimore County, Maryland | 27.0% | 
| 7 | Wicomico County, Maryland | 24.9% | 
| 8 | Montgomery County, Maryland | 18.3% | 
| 9 | Howard County, Maryland | 18.1% | 
| 10 | Anne Arundel County, Maryland | 16.1% | 
| 11 | Kent County, Maryland | 15.2% | 
| 12 | St Marys County, Maryland | 14.3% | 
| 13 | Caroline County, Maryland | 14.3% | 
| 14 | Worcester County, Maryland | 13.8% | 
| 15 | Calvert County, Maryland | 13.4% | 
| 16 | Talbot County, Maryland | 13.3% | 
| 17 | Harford County, Maryland | 13.1% | 
| 18 | Washington County, Maryland | 10.4% | 
| 19 | Frederick County, Maryland | 9.1% | 
| 20 | Allegany County, Maryland | 8.2% | 
| 21 | Queen Annes County, Maryland | 7.0% | 
| 22 | Cecil County, Maryland | 6.5% | 
| 23 | Carroll County, Maryland | 3.4% | 
| 24 | Garrett County, Maryland | 1.1% | 
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