Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Griffith Park | Park | 164 | Montgomery | 39 13 41 N | 077 07 14 W |
| Grove Park | Park | 84 | Frederick | 39 24 30 N | 077 23 49 W |
| Grove Point Wildlife Sanctuary | Park | 0 | Cecil | 39 23 20 N | 076 01 12 W |
| Guilford Park | Park | 85 | Howard | 39 09 20 N | 076 49 19 W |
| Gunners Branch Park | Park | 100 | Montgomery | 39 09 43 N | 077 15 39 W |
| Gunners Lake Park | Park | 145 | Montgomery | 39 10 08 N | 077 15 44 W |
| Gunpowder Point Park | Park | 2 | Harford | 39 23 55 N | 076 20 59 W |
| Gunpowder State Park | Park | 12 | Baltimore | 39 21 45 N | 076 20 33 W |
| Gwynn Acres Park | Park | 109 | Howard | 39 15 30 N | 076 50 52 W |
| Gwynn Oak Park | Park | 93 | Baltimore | 39 19 38 N | 076 43 00 W |
| Gwynnbrook State Game Farm | Park | 184 | Baltimore | 39 26 44 N | 076 46 48 W |
| Gwynns Falls Park | Park | 94 | Baltimore (city) | 39 18 07 N | 076 40 59 W |
| Gwynns Falls Recreation Center | Park | 21 | Baltimore (city) | 39 16 40 N | 076 39 47 W |
| H P Johnson Park | Park | 36 | Prince George's | 38 55 28 N | 076 51 24 W |
| Hager Park | Park | 157 | Washington | 39 37 58 N | 077 42 55 W |
| Hagerstown City Park Historic District | Park | 175 | Washington | 39 38 09 N | 077 43 57 W |
| Hagerstown Commercial Core Historic District | Park | 166 | Washington | 39 38 35 N | 077 43 15 W |
| Halfway County Park | Park | 176 | Washington | 39 36 29 N | 077 45 49 W |
| Hall Park | Park | 44 | Prince George's | 39 00 20 N | 076 49 59 W |
| Hallowing Point Park | Park | 16 | Calvert | 38 30 39 N | 076 37 47 W |
| Hamilton Recreation Center | Park | 90 | Baltimore (city) | 39 21 01 N | 076 33 15 W |
| Hammond Park | Park | 101 | Howard | 39 08 45 N | 076 53 02 W |
| Hampstead Memorial Park | Park | 265 | Carroll | 39 37 06 N | 076 51 20 W |
| Hampton National Historic Site | Park | 115 | Baltimore | 39 25 02 N | 076 35 16 W |
| Hampton National Historical Site | Park | 116 | Baltimore | 39 24 58 N | 076 35 17 W |
| Hancocks Resolution Park | Park | 3 | Anne Arundel | 39 08 05 N | 076 26 49 W |
| Hanlon Park | Park | 94 | Baltimore (city) | 39 19 08 N | 076 40 01 W |
| Hannah More Park | Park | 220 | Baltimore | 39 27 08 N | 076 48 57 W |
| Hanover Watershed Wildlife Management Area | Park | 270 | Carroll | 39 43 05 N | 076 55 57 W |
| Harbor View Park | Park | 37 | Baltimore | 39 17 09 N | 076 31 21 W |
| Hard Lodging Historic Site | Park | 137 | Carroll | 39 33 55 N | 077 09 56 W |
| Harford Furnace Historic District | Park | 42 | Harford | 39 29 42 N | 076 15 41 W |
| Harford Glen Park | Park | 59 | Harford | 39 29 10 N | 076 20 30 W |
| Harlem Park | Park | 43 | Baltimore (city) | 39 17 45 N | 076 38 30 W |
| Harmans Park | Park | 55 | Anne Arundel | 39 09 10 N | 076 42 57 W |
| Harmon Field | Park | 9 | Wicomico | 38 21 28 N | 075 34 52 W |
| Harmon Field Playground | Park | 93 | Frederick | 39 24 29 N | 077 24 25 W |
| Harmony Community Park | Park | 12 | Caroline | 38 46 47 N | 075 52 41 W |
| Harry Grove Stadium | Park | 97 | Frederick | 39 24 04 N | 077 24 53 W |
| Harry T Greager Memorial Athletic Field | Park | 91 | Frederick | 39 24 27 N | 077 24 23 W |
| Hart-Miller Island State Park | Park | 0 | Baltimore | 39 15 04 N | 076 22 37 W |
| Hart-Miller Pleasure Islands Natural Resources Management Park | Park | 7 | Baltimore | 39 15 04 N | 076 21 39 W |
| Harwood Park | Park | 30 | Howard | 39 11 28 N | 076 44 14 W |
| Hashawha Environmental Center | Park | 198 | Carroll | 39 38 50 N | 076 59 25 W |
| Hatchery Park | Park | 5 | Cecil | 39 36 30 N | 075 48 48 W |
| Havenwood Park | Park | 20 | Anne Arundel | 39 07 57 N | 076 32 51 W |
| Havre de Grace Historic District | Park | 18 | Harford | 39 32 55 N | 076 05 36 W |
| Hawkins Zouaves Monument | Park | 152 | Washington | 39 27 09 N | 077 44 36 W |
| Hawlings River Regional Park | Park | 107 | Montgomery | 39 12 06 N | 077 03 09 W |
| Hawthorn Park | Park | 131 | Howard | 39 12 20 N | 076 52 59 W |
| Hazelwood Park | Park | 33 | Baltimore | 39 20 33 N | 076 31 29 W |
| Heaters Island Wildlife Management Area | Park | 70 | Frederick | 39 15 57 N | 077 31 51 W |
| Heather Hills Park | Park | 42 | Prince George's | 38 57 03 N | 076 43 54 W |
| Heavenly Waters Park | Park | 111 | Harford | 39 31 58 N | 076 21 44 W |
| Hebron Lions Park | Park | 11 | Wicomico | 38 25 22 N | 075 41 36 W |
| Hellane Park | Park | 196 | Washington | 39 39 04 N | 077 44 26 W |
| Henderson Community Park | Park | 16 | Caroline | 39 04 20 N | 075 45 37 W |
| Herald Harbor Park | Park | 17 | Anne Arundel | 39 03 13 N | 076 34 07 W |
| Herndon Monument | Park | 6 | Anne Arundel | 38 58 56 N | 076 29 11 W |
| Herring Run Park | Park | 16 | Baltimore (city) | 39 19 19 N | 076 33 34 W |
| Herrington Manor State Park | Park | 755 | Garrett | 39 27 12 N | 079 27 04 W |
| Hickory Hills Park | Park | 21 | Baltimore | 39 14 04 N | 076 38 45 W |
| Hickory Park | Park | 135 | Harford | 39 35 22 N | 076 20 51 W |
| High Bridge Park | Park | 56 | Prince George's | 38 58 55 N | 076 46 25 W |
| High Ridge Park | Park | 81 | Howard | 39 06 49 N | 076 52 04 W |
| Highland Park | Park | 153 | Harford | 39 40 13 N | 076 22 37 W |
| Highland Stone Park | Park | 121 | Montgomery | 39 02 52 N | 077 10 39 W |
| Highpoint Park | Park | 12 | Anne Arundel | 39 08 47 N | 076 32 28 W |
| Hill Road Park | Park | 51 | Prince George's | 38 54 32 N | 076 51 21 W |
| Hill Road Recreation Center | Park | 52 | Prince George's | 38 54 31 N | 076 51 21 W |
| Hillcrest Park | Park | 41 | Baltimore | 39 14 42 N | 076 39 10 W |
| Hillcrest Park | Park | 139 | Frederick | 39 24 37 N | 077 27 16 W |
| Hillcrest Park | Park | 124 | Montgomery | 39 04 39 N | 077 07 56 W |
| Hillcrest Park | Park | 47 | Prince George's | 38 49 42 N | 076 58 13 W |
| Hilton Recreation Center | Park | 56 | Baltimore (city) | 39 17 19 N | 076 40 10 W |
| Hollingsworth Park | Park | 3 | Cecil | 39 35 59 N | 075 50 56 W |
| Holloway Estates Park | Park | 70 | Prince George's | 38 45 29 N | 076 49 07 W |
| Holly Tree Park | Park | 40 | Cecil | 39 34 59 N | 076 02 24 W |
| Hollywood Park | Park | 32 | St. Mary's | 38 20 10 N | 076 35 46 W |
| Hollywood Recreation Center | Park | 25 | Prince George's | 39 00 46 N | 076 54 40 W |
| Holmes Park | Park | 178 | Carroll | 39 25 16 N | 076 57 25 W |
| Holocaust Memorial | Park | 4 | Baltimore (city) | 39 17 17 N | 076 36 31 W |
| Holt Park | Park | 42 | Baltimore | 39 21 07 N | 076 30 57 W |
| Homestead Park | Park | 103 | Harford | 39 31 53 N | 076 19 43 W |
| Homewood Field | Park | 81 | Baltimore (city) | 39 20 00 N | 076 37 15 W |
| Homewood-Capital View Park | Park | 126 | Montgomery | 39 01 39 N | 077 03 34 W |
| Hopewell Park | Park | 110 | Howard | 39 10 46 N | 076 50 01 W |
| Hopkins Plaza | Park | 68 | Baltimore (city) | 39 19 44 N | 076 37 04 W |
| Horizon Hill Park | Park | 105 | Montgomery | 39 04 15 N | 077 10 44 W |
| Horsehead Farm Wildlife Sanctuary | Park | 2 | Queen Anne's | 38 56 57 N | 076 13 53 W |
| Howard County Fairground | Park | 165 | Howard | 39 18 40 N | 076 58 00 W |
| Hugh Thomas Wildlife Management Area | Park | 161 | Howard | 39 21 34 N | 076 58 34 W |
| Hughes Memorial Stadium | Park | 66 | Baltimore (city) | 39 20 37 N | 076 34 58 W |
| Hughesville Pond Recreation Area | Park | 55 | Charles | 38 32 54 N | 076 48 14 W |
| Hunters Mill Recreation Area | Park | 43 | Prince George's | 38 45 46 N | 076 58 39 W |
| Huntington North Recreation Area | Park | 48 | Prince George's | 39 00 34 N | 076 47 16 W |
| Huntington South Recreation Area | Park | 53 | Prince George's | 39 00 19 N | 076 46 21 W |
| Huntsmoor Park | Park | 71 | Baltimore | 39 14 32 N | 076 42 39 W |
| Hurlock Park | Park | 14 | Dorchester | 38 37 48 N | 075 52 04 W |
| Husky Park | Park | 85 | Frederick | 39 24 57 N | 077 23 45 W |
| Hyattsville Historic District | Park | 17 | Prince George's | 38 57 13 N | 076 56 26 W |
| Hyde Field | Park | 73 | Prince George's | 38 44 56 N | 076 56 01 W |
| Idlewild Park | Park | 9 | Talbot | 38 45 48 N | 076 04 19 W |
| Idylwild State Wildlife Management Area | Park | 9 | Caroline | 38 43 37 N | 075 45 02 W |
| Indian Creek Park | Park | 16 | Prince George's | 38 59 14 N | 076 55 06 W |
| Indian Springs Wildlife Demonstration Area | Park | 418 | Washington | 39 42 14 N | 077 59 46 W |
| Indian Springs Wildlife Management Area | Park | 475 | Washington | 39 43 00 N | 078 00 00 W |
| Indian Village Archeological Park | Park | 7 | St. Mary's | 38 15 37 N | 076 38 28 W |
| Indian Village Neighborhood Park | Park | 11 | Wicomico | 38 23 01 N | 075 36 58 W |
| Ingram Field | Park | 4 | Anne Arundel | 38 59 02 N | 076 29 03 W |