| Rank | County | Businesses |
|---|---|---|
| 1 | Montgomery County, Maryland | 115,471 |
| 2 | Baltimore County, Maryland | 76,111 |
| 3 | Prince Georges County, Maryland | 72,759 |
| 4 | Anne Arundel County, Maryland | 49,600 |
| 5 | Baltimore city, Maryland | 42,272 |
| 6 | Howard County, Maryland | 30,899 |
| 7 | Frederick County, Maryland | 21,430 |
| 8 | Harford County, Maryland | 20,260 |
| 9 | Carroll County, Maryland | 15,984 |
| 10 | Washington County, Maryland | 11,240 |
| 11 | Charles County, Maryland | 11,011 |
| 12 | Wicomico County, Maryland | 8,539 |
| 13 | Cecil County, Maryland | 7,583 |
| 14 | Calvert County, Maryland | 7,554 |
| 15 | Worcester County, Maryland | 7,514 |
| 16 | St Marys County, Maryland | 7,383 |
| 17 | Queen Annes County, Maryland | 5,701 |
| 18 | Talbot County, Maryland | 5,247 |
| 19 | Allegany County, Maryland | 5,071 |
| 20 | Garrett County, Maryland | 3,478 |
| 21 | Dorchester County, Maryland | 2,942 |
| 22 | Caroline County, Maryland | 2,942 |
| 23 | Kent County, Maryland | 2,694 |
| 24 | Somerset County, Maryland | 2,099 |
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