| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Du-Mar Estates | city | Maryland | United States | 38.57 | -77.16 | 49 | |
| Dublin | city | Maryland | United States | 39.65 | -76.27 | 830 | |
| Dublin Manor | city | Maryland | United States | 39.62 | -76.93 | 931 | |
| Dublin Manor | city | Maryland | United States | 39.65 | -76.26 | 830 | |
| Dublin Manor | city | Maryland | United States | 39.48 | -77.38 | 298 | |
| Dubois | city | Maryland | United States | 38.48 | -76.83 | 147 | |
| Dubois Park | city | Maryland | United States | 38.48 | -76.84 | 147 | |
| Ducat Town | city | Maryland | United States | 38.95 | -76.92 | 147 | |
| Duckettsville | city | Maryland | United States | 39.01 | -76.80 | 147 | |
| Dudley Corners | city | Maryland | United States | 39.18 | -75.89 | 49 | |
| Duers Neck Landing | city | Maryland | United States | 38.10 | -75.32 | 0 | |
| Duffield | city | Maryland | United States | 39.08 | -76.57 | 45 | |
| Dug Hill | city | Maryland | United States | 39.68 | -76.89 | 843 | |
| Duhamel Corners | city | Maryland | United States | 39.19 | -75.83 | 45 | |
| Dukes Retreat | city | Maryland | United States | 38.20 | -76.53 | 22 | |
| Dulaney Gate | city | Maryland | United States | 39.47 | -76.60 | 830 | |
| Dulaney Hills | city | Maryland | United States | 39.48 | -76.52 | 830 | |
| Dulaney Ridge | city | Maryland | United States | 39.60 | -76.46 | 830 | |
| Dulaney Valley (historical) | city | Maryland | United States | 39.46 | -76.55 | 249 | |
| Dulaney Valley Estates | city | Maryland | United States | 39.50 | -76.51 | 830 | |
| Dulaney Village | city | Maryland | United States | 39.42 | -76.60 | 360 | |
| Dulany Hills | city | Maryland | United States | 39.47 | -77.08 | 830 | |
| Duley | city | Maryland | United States | 38.75 | -76.80 | 200 | |
| Dulls Corner | city | Maryland | United States | 39.00 | -76.48 | 49 | |
| Dumbarton | city | Maryland | United States | 39.38 | -76.71 | 830 | |
| Dun Rovin | city | Maryland | United States | 39.48 | -76.63 | 830 | |
| Dunbar | city | Maryland | United States | 39.41 | -76.77 | 830 | |
| Dunbrook | city | Maryland | United States | 39.13 | -76.54 | 49 | |
| Duncan Crossing | city | Maryland | United States | 38.40 | -75.31 | 29 | |
| Duncans Hill | city | Maryland | United States | 39.59 | -76.89 | 830 | |
| Dundalk | city | Maryland | United States | 39.25 | -76.52 | 3 | |
| Dundalk Mobile Home Court | city | Maryland | United States | 39.25 | -76.50 | 3 | |
| Dundee | city | Maryland | United States | 39.14 | -76.62 | 49 | |
| Dundee Village | city | Maryland | United States | 39.35 | -76.38 | 3 | |
| Dunfretten Estates | city | Maryland | United States | 39.22 | -76.99 | 830 | |
| Dunkeld Manor | city | Maryland | United States | 39.07 | -76.54 | 3 | |
| Dunkirk | city | Maryland | United States | 38.72 | -76.66 | 98 | |
| Dunkirk Fields | city | Maryland | United States | 38.72 | -76.64 | 82 | |
| Dunkirk Hall | city | Maryland | United States | 38.70 | -76.65 | 98 | |
| Dunkirk South | city | Maryland | United States | 38.71 | -76.66 | 85 | |
| Dunkirk Woods | city | Maryland | United States | 38.73 | -76.64 | 98 | |
| Dunleigh | city | Maryland | United States | 38.75 | -76.66 | 98 | |
| Dunloggin | city | Maryland | United States | 39.26 | -76.83 | 393 | |
| Dunlops Hills | city | Maryland | United States | 38.99 | -77.07 | 200 | |
| Dunmoor Woods | city | Maryland | United States | 39.26 | -76.86 | 400 | |
| Dunsen Heights | city | Maryland | United States | 39.66 | -76.38 | 830 | |
| Dunstable Green | city | Maryland | United States | 39.02 | -76.55 | 98 | |
| Dunwood | city | Maryland | United States | 39.48 | -76.38 | 298 | |
| Dupont Heights | city | Maryland | United States | 38.86 | -76.92 | 249 | |
| Dutchmans Cove | city | Maryland | United States | 38.16 | -76.43 | 3 | |
| Duvall Manor | city | Maryland | United States | 39.27 | -77.20 | 830 |