| Rank | County | Percentage of Seniors | 
|---|---|---|
| 1 | Talbot County, Maryland | 25.5% | 
| 2 | Worcester County, Maryland | 24.3% | 
| 3 | Kent County, Maryland | 23.3% | 
| 4 | Dorchester County, Maryland | 18.8% | 
| 5 | Garrett County, Maryland | 18.6% | 
| 6 | Allegany County, Maryland | 18.5% | 
| 7 | Queen Annes County, Maryland | 16.1% | 
| 8 | Baltimore County, Maryland | 15.1% | 
| 9 | Washington County, Maryland | 14.9% | 
| 10 | Caroline County, Maryland | 14.4% | 
| 11 | Somerset County, Maryland | 14.4% | 
| 12 | Carroll County, Maryland | 14.3% | 
| 13 | Wicomico County, Maryland | 13.6% | 
| 14 | Harford County, Maryland | 13.5% | 
| 15 | Montgomery County, Maryland | 12.9% | 
| 16 | Cecil County, Maryland | 12.9% | 
| 17 | Anne Arundel County, Maryland | 12.7% | 
| 18 | Frederick County, Maryland | 12.0% | 
| 19 | Calvert County, Maryland | 12.0% | 
| 20 | Baltimore city, Maryland | 11.9% | 
| 21 | Howard County, Maryland | 11.2% | 
| 22 | St Marys County, Maryland | 11.0% | 
| 23 | Prince Georges County, Maryland | 10.3% | 
| 24 | Charles County, Maryland | 10.3% | 
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