Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Harmans/Dorsey Fire Station Company 21 | Building | | Anne Arundel | 39 16 29 N | 077 11 15 W |
| Harold J. Cordts Physical Education Center | Building | | Allegany | 39 38 58 N | 078 56 01 W |
| Harriet Tubman Residence Hall | Building | | Prince George's | 39 01 12 N | 076 45 36 W |
| Harwood/Lothian Fire Station Company 9 | Building | | Anne Arundel | 39 23 15 N | 077 01 39 W |
| Havre de Grace Branch Harford County Library | Building | 16 | Harford | 39 32 53 N | 076 05 31 W |
| Havre de Grace City Hall | Building | 17 | Harford | 39 32 54 N | 076 05 29 W |
| Havre de Grace Decoy Museum | Building | 8 | Harford | 39 32 25 N | 076 05 14 W |
| Health Administration Headquarters | Building | 133 | Montgomery | 39 06 11 N | 077 11 10 W |
| Health and Human Services Building | Building | | Baltimore (city) | 39 18 31 N | 076 39 35 W |
| Hebrew Home of Washington | Building | 108 | Montgomery | 39 03 14 N | 077 07 28 W |
| Hebron Town Hall | Building | 12 | Wicomico | 38 25 08 N | 075 41 21 W |
| Heights Playhouse | Building | 78 | Montgomery | 39 01 34 N | 077 09 47 W |
| Hendrix Oceanography Labratory | Building | 3 | Anne Arundel | 38 59 01 N | 076 28 46 W |
| Herald Harbor Fire Company 6 | Building | | Anne Arundel | 39 02 59 N | 076 34 32 W |
| Herald Harbor Fire Department | Building | | Anne Arundel | 39 05 35 N | 076 57 44 W |
| Hereford Branch Baltimore County Public Library | Building | 208 | Baltimore | 39 35 20 N | 076 39 48 W |
| Hereford Volunteer Ambulance Association Station 53 | Building | | Baltimore | 39 59 08 N | 077 05 13 W |
| Hereford Volunteer Fire Company Station 44 | Building | | Baltimore | 39 59 32 N | 077 06 24 W |
| Herring Run Branch Enoch Pratt Free Library | Building | 51 | Baltimore (city) | 39 18 55 N | 076 34 10 W |
| Heubeck Hall | Building | 135 | Baltimore | 39 24 27 N | 076 35 30 W |
| Heubeck Hall | Building | | Baltimore | 39 24 26 N | 076 35 30 W |
| Highland Reading Center | Building | 160 | Harford | 39 40 06 N | 076 22 39 W |
| Highlandtown Branch Enoch Pratt Free Library | Building | 29 | Baltimore (city) | 39 17 10 N | 076 34 11 W |
| Hillandale Volunteer Fire Department Fire Station 12 | Building | | Montgomery | 39 03 02 N | 077 38 34 W |
| Hillandale Volunteer Fire Department Fire Station 24 | Building | | Montgomery | 39 03 02 N | 077 38 34 W |
| Hillcrest Heights Branch Library | Building | 87 | Prince George's | 38 50 06 N | 076 57 23 W |
| Hillcrest Heights Branch Prince George's County Memorial Library | Building | 85 | Prince George's | 38 50 04 N | 076 57 30 W |
| Hillendale Fire Department Station 11 | Building | | Baltimore | 39 22 45 N | 076 34 50 W |
| Historical Society of Talbot County Museum | Building | 7 | Talbot | 38 46 27 N | 076 04 35 W |
| Hitchins Administration Building | Building | 589 | Allegany | 39 38 59 N | 078 55 58 W |