All counties in Maryland
| County Name | Population | State | Rank |
|---|
| Montgomery County | 971,777 | Maryland | 1 |
| Prince George's County | 863,420 | Maryland | 2 |
| Baltimore County | 805,029 | Maryland | 3 |
| Baltimore City | 620,961 | Maryland | 4 |
| Anne Arundel County | 537,656 | Maryland | 5 |
| Howard County | 287,085 | Maryland | 6 |
| Harford County | 244,826 | Maryland | 7 |
| Frederick County | 233,385 | Maryland | 8 |
| Carroll County | 167,134 | Maryland | 9 |
| Washington County | 147,430 | Maryland | 10 |
| Charles County | 146,551 | Maryland | 11 |
| St. Mary's County | 105,151 | Maryland | 12 |
| Cecil County | 101,108 | Maryland | 13 |
| Wicomico County | 98,733 | Maryland | 14 |
| Calvert County | 88,737 | Maryland | 15 |
| Allegany County | 75,087 | Maryland | 16 |
| Worcester County | 51,454 | Maryland | 17 |
| Queen Anne's County | 47,798 | Maryland | 18 |
| Talbot County | 37,782 | Maryland | 19 |
| Caroline County | 33,066 | Maryland | 20 |
| Dorchester County | 32,618 | Maryland | 21 |
| Garrett County | 30,097 | Maryland | 22 |
| Somerset County | 26,470 | Maryland | 23 |
| Kent County | 20,197 | Maryland | 24 |