| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Head of Canal (historical) | city | Maryland | United States | 39.71 | -76.22 | 255 | |
| Head of Creek (historical) | city | Maryland | United States | 38.25 | -75.65 | 22 | |
| Hearns (historical) | city | Maryland | United States | 38.43 | -75.43 | 55 | |
| Hearts Ease | city | Maryland | United States | 38.02 | -75.82 | 3 | |
| Heather Heights | city | Maryland | United States | 39.19 | -76.08 | 3 | |
| Heather Hills | city | Maryland | United States | 38.95 | -76.73 | 101 | |
| Heather Knolls | city | Maryland | United States | 38.59 | -76.55 | 104 | |
| Heather Ridge | city | Maryland | United States | 39.42 | -77.02 | 830 | |
| Heather Woods | city | Maryland | United States | 38.99 | -76.66 | 98 | |
| Heatherview | city | Maryland | United States | 39.51 | -77.44 | 403 | |
| Heatherwick | city | Maryland | United States | 38.72 | -76.86 | 196 | |
| Heatherwood | city | Maryland | United States | 39.32 | -76.97 | 830 | |
| Hebbville | city | Maryland | United States | 39.34 | -76.76 | 830 | |
| Hebron | city | Maryland | United States | 38.42 | -75.69 | 32 | |
| Hebron Woods | city | Maryland | United States | 38.44 | -75.69 | 39 | |
| Heise | city | Maryland | United States | 39.44 | -77.21 | 830 | |
| Helen | city | Maryland | United States | 38.38 | -76.72 | 98 | |
| Helen Estates | city | Maryland | United States | 38.39 | -76.72 | 98 | |
| Helen Farmettes | city | Maryland | United States | 38.39 | -76.73 | 98 | |
| Hellen | city | Maryland | United States | 38.44 | -76.58 | 49 | |
| Hellen Creek Estates | city | Maryland | United States | 38.36 | -76.47 | 3 | |
| Helliesen | city | Maryland | United States | 39.39 | -77.20 | 830 | |
| Helmsley Court | city | Maryland | United States | 39.39 | -76.70 | 830 | |
| Hemlock Estates | city | Maryland | United States | 38.37 | -76.46 | 49 | |
| Hemlock Hill | city | Maryland | United States | 39.18 | -76.96 | 830 | |
| Hemlock Ridge | city | Maryland | United States | 39.52 | -76.26 | 298 | |
| Hemp Hills | city | Maryland | United States | 39.49 | -77.14 | 830 | |
| Henderson | city | Maryland | United States | 39.07 | -75.77 | 45 | |
| Henderson Corner | city | Maryland | United States | 39.20 | -77.25 | 830 | |
| Henekes Corner | city | Maryland | United States | 39.04 | -76.49 | 88 | |
| Henley Park | city | Maryland | United States | 39.49 | -76.25 | 147 | |
| Henleys | city | Maryland | United States | 39.47 | -77.28 | 830 | |
| Henrys Bridge | city | Maryland | United States | 39.53 | -76.57 | 830 | |
| Henrys Crossroads | city | Maryland | United States | 38.42 | -75.87 | 6 | |
| Henryton | city | Maryland | United States | 39.35 | -76.91 | 830 | |
| Henryton Heights | city | Maryland | United States | 39.32 | -76.92 | 830 | |
| Hepbron | city | Maryland | United States | 39.30 | -76.04 | 49 | |
| Herald Harbor | city | Maryland | United States | 39.05 | -76.57 | 0 | |
| Heraldry Square | city | Maryland | United States | 39.32 | -76.76 | 400 | |
| Hereford | city | Maryland | United States | 39.59 | -76.66 | 830 | |
| Heritage | city | Maryland | United States | 39.45 | -77.00 | 830 | |
| Heritage | city | Maryland | United States | 38.97 | -76.52 | 45 | |
| Heritage Estates | city | Maryland | United States | 39.60 | -76.20 | 278 | |
| Heritage Estates | city | Maryland | United States | 39.55 | -77.76 | 830 | |
| Heritage Farms | city | Maryland | United States | 39.34 | -76.95 | 830 | |
| Heritage Harbour | city | Maryland | United States | 38.98 | -76.59 | 91 | |
| Heritage Heights | city | Maryland | United States | 39.20 | -76.94 | 400 | |
| Heritage Hill | city | Maryland | United States | 39.20 | -76.62 | 134 | |
| Heritage Hills | city | Maryland | United States | 39.30 | -77.36 | 383 | |
| Heritage Hills | city | Maryland | United States | 38.87 | -76.70 | 104 | |
| Heritage Manor | city | Maryland | United States | 38.32 | -75.53 | 45 | |
| Heritage Mobile Home Park | city | Maryland | United States | 38.59 | -75.93 | 32 | |
| Heritage Valley | city | Maryland | United States | 39.59 | -75.82 | 49 | |
| Heritage Walk | city | Maryland | United States | 39.03 | -77.14 | 347 | |
| Heritage Woods | city | Maryland | United States | 39.60 | -75.82 | 49 | |
| Heritage Woods | city | Maryland | United States | 39.56 | -76.34 | 318 | |
| Heritage Woods | city | Maryland | United States | 39.16 | -76.82 | 275 | |
| Hermanville | city | Maryland | United States | 38.25 | -76.43 | 98 | |
| Hermitage Hill | city | Maryland | United States | 38.99 | -76.65 | 147 | |
| Hermitage Park | city | Maryland | United States | 39.08 | -77.06 | 374 | |
| Hernwood | city | Maryland | United States | 39.37 | -76.84 | 830 | |
| Hernwood Heights | city | Maryland | United States | 39.38 | -76.83 | 830 | |
| Heron Point | city | Maryland | United States | 39.22 | -76.06 | 3 | |
| Herons Watch | city | Maryland | United States | 39.09 | -76.46 | 0 | |
| Herring Creek | city | Maryland | United States | 38.19 | -76.54 | 19 | |
| Herring Creek Estates | city | Maryland | United States | 38.18 | -76.53 | 3 | |
| Herring Estates | city | Maryland | United States | 39.64 | -77.16 | 830 | |
| Herring Landing | city | Maryland | United States | 38.35 | -75.12 | 9 | |
| Herrington Manor | city | Maryland | United States | 39.45 | -79.45 | 2509 | |
| Hess | city | Maryland | United States | 39.56 | -76.53 | 830 | |
| Hewitt Farms | city | Maryland | United States | 39.43 | -76.80 | 830 |