19 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Aspen Hill | Montgomery County | 54,904 |
| Annapolis | Anne Arundel County | 40,605 |
| Arnold | Anne Arundel County | 24,041 |
| Arbutus | Baltimore County | 20,958 |
| Aberdeen | Harford County | 19,541 |
| Adelphi | Prince George's County | 17,700 |
| Accokeek | Prince George's County | 13,838 |
| Annapolis Neck | Anne Arundel County | 12,838 |
| Abingdon | Harford County | 7,049 |
| Ashton-Sandy Spring | Howard County | 5,370 |
| Andrews AFB | Prince George's County | 3,099 |
| Aberdeen Proving Ground | Harford County | 2,401 |
| Adamstown | Frederick County | 2,383 |
| Arden on the Severn | Anne Arundel County | 1,631 |
| Algonquin | Dorchester County | 978 |
| Aquasco | Prince George's County | 601 |
| Accident | Garrett County | 329 |
| Allen | Wicomico County | 105 |
| Antietam | Washington County | 63 |