| Rank | County | Population Density |
|---|---|---|
| 1 | Baltimore city, Maryland | 7,671.5 |
| 2 | Montgomery County, Maryland | 1,978.2 |
| 3 | Prince Georges County, Maryland | 1,788.8 |
| 4 | Baltimore County, Maryland | 1,345.5 |
| 5 | Anne Arundel County, Maryland | 1,295.9 |
| 6 | Howard County, Maryland | 1,144.9 |
| 7 | Harford County, Maryland | 560.1 |
| 8 | Calvert County, Maryland | 416.3 |
| 9 | Carroll County, Maryland | 373.4 |
| 10 | Frederick County, Maryland | 353.5 |
| 11 | Washington County, Maryland | 322.1 |
| 12 | Charles County, Maryland | 320.2 |
| 13 | St Marys County, Maryland | 294.4 |
| 14 | Cecil County, Maryland | 292 |
| 15 | Wicomico County, Maryland | 263.7 |
| 16 | Allegany County, Maryland | 177 |
| 17 | Talbot County, Maryland | 140.7 |
| 18 | Queen Annes County, Maryland | 128.5 |
| 19 | Worcester County, Maryland | 109.9 |
| 20 | Caroline County, Maryland | 103.5 |
| 21 | Somerset County, Maryland | 82.8 |
| 22 | Kent County, Maryland | 72.9 |
| 23 | Dorchester County, Maryland | 60.3 |
| 24 | Garrett County, Maryland | 46.5 |
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