| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Muirkirk | city | Maryland | United States | 39.06 | -76.89 | 177 | |
| Mulberry Hill | city | Maryland | United States | 38.79 | -76.06 | 49 | |
| Mulberry Point | city | Maryland | United States | 38.75 | -76.25 | 3 | |
| Mulberry Tree Acres | city | Maryland | United States | 39.35 | -77.49 | 400 | |
| Mullinix | city | Maryland | United States | 39.29 | -77.15 | 830 | |
| Mullins Trailer Park | city | Maryland | United States | 39.52 | -76.14 | 49 | |
| Mumfords Landing | city | Maryland | United States | 38.39 | -75.14 | 3 | |
| Muncaster Manor | city | Maryland | United States | 39.17 | -77.12 | 830 | |
| Munson Heights | city | Maryland | United States | 39.15 | -76.69 | 173 | |
| Murray Hill | city | Maryland | United States | 39.39 | -76.63 | 393 | |
| Murray Hill | city | Maryland | United States | 39.15 | -76.88 | 351 | |
| Murray Hill | city | Maryland | United States | 38.78 | -76.99 | 52 | |
| Musgrove Estates | city | Maryland | United States | 38.64 | -76.63 | 104 | |
| Mussel Shoals | city | Maryland | United States | 39.24 | -75.92 | 45 | |
| Mutual | city | Maryland | United States | 38.47 | -76.55 | 137 | |
| Mutual Consent | city | Maryland | United States | 38.46 | -76.56 | 95 | |
| Mutual Estates | city | Maryland | United States | 38.49 | -76.55 | 147 |