Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Grace United Methodist Church | Church | 126 | Baltimore (city) | 39 21 43 N | 076 37 27 W |
| Grace United Methodist Church | Church | 7 | Dorchester | 38 34 04 N | 076 04 42 W |
| Grace United Methodist Church | Church | 32 | Harford | 39 30 35 N | 076 09 57 W |
| Grace United Methodist Church | Church | 156 | Montgomery | 39 08 37 N | 077 12 03 W |
| Grace United Methodist Church | Church | 55 | Prince George's | 38 58 36 N | 076 59 30 W |
| Grace United Methodist Church | Church | 32 | Prince George's | 38 54 00 N | 076 54 58 W |
| Grace United Methodist Church | Church | 182 | Washington | 39 39 00 N | 077 43 45 W |
| Grace United Presbyterian Church | Church | 122 | Baltimore (city) | 39 20 50 N | 076 39 35 W |
| Graceham | Populated Place | 150 | Frederick | 39 36 51 N | 077 22 54 W |
| Graceham Cemetery | Cemetery | 135 | Frederick | 39 37 01 N | 077 22 42 W |
| Graceham Moravian Church | Church | 135 | Frederick | 39 36 55 N | 077 22 44 W |
| Graceland | Populated Place | 11 | Baltimore | 39 16 37 N | 076 31 38 W |
| Graceland Park United Methodist Church | Church | 9 | Baltimore (city) | 39 16 41 N | 076 31 56 W |
| Graceland Park-O'Donnel Heights School | School | 16 | Baltimore (city) | 39 16 57 N | 076 32 23 W |
| Graces Quarters | Locale | 1 | Baltimore | 39 20 57 N | 076 20 21 W |
| Graceton | Populated Place | 182 | Harford | 39 43 08 N | 076 23 05 W |
| Grael Hill Park | Park | 132 | Harford | 39 33 59 N | 076 09 49 W |
| Graeloch Woods | Populated Place | 115 | Howard | 39 09 14 N | 076 53 08 W |
| Grafton (historical) | Populated Place | 22 | Charles | 38 26 25 N | 077 11 56 W |
| Grafton Heights | Populated Place | 116 | Harford | 39 32 42 N | 076 15 03 W |
| Grafton Manor | Populated Place | 211 | Carroll | 39 30 40 N | 076 56 38 W |
| Grafton Shops (historical) | Populated Place | 177 | Harford | 39 34 49 N | 076 24 16 W |
| Graham Creek | Stream | | Calvert | 38 39 38 N | 076 40 54 W |
| Graham Memorial Park | Cemetery | 94 | Baltimore | 39 24 56 N | 076 30 17 W |
| Graham Tunnel | Tunnel | 280 | Allegany | 39 33 21 N | 078 25 55 W |
| Grahams Green Acres | Populated Place | 233 | Carroll | 39 29 42 N | 077 03 28 W |
| Grahamtown | Populated Place | 572 | Allegany | 39 38 46 N | 078 55 19 W |
| Gramies Run | Stream | | Cecil | 39 40 10 N | 075 49 41 W |
| Grammers Cove | Bay | -3 | Calvert | 38 24 40 N | 076 31 34 W |
| Granary Creek | Bay | 0 | Queen Anne's | 38 53 15 N | 076 08 17 W |
| Granby Woods | Populated Place | 159 | Montgomery | 39 09 47 N | 077 07 02 W |
| Grand Meadows | Populated Place | 99 | Cecil | 39 43 05 N | 075 48 01 W |
| Grand Valley Acres | Populated Place | 263 | Carroll | 39 42 18 N | 076 58 08 W |
| Grand Valley Farms | Locale | 248 | Carroll | 39 42 40 N | 076 58 27 W |
| Grand View | Populated Place | 183 | Carroll | 39 23 49 N | 076 57 31 W |
| Grand View Park | Populated Place | 32 | Anne Arundel | 39 06 14 N | 076 41 14 W |
| Grand York Shopping Center | Locale | 123 | Baltimore | 39 25 53 N | 076 37 18 W |
| Grande View Farms | Locale | 129 | Harford | 39 41 15 N | 076 21 04 W |
| Grandview Church | Church | 170 | Harford | 39 31 44 N | 076 26 43 W |
| Grandview Methodist Church | Church | 171 | Harford | 39 31 40 N | 076 26 53 W |
| Grange | Populated Place | 7 | Baltimore | 39 15 55 N | 076 29 53 W |
| Grange Elementary School | School | 4 | Baltimore | 39 15 53 N | 076 30 08 W |
| Granite | Populated Place | 133 | Baltimore | 39 20 34 N | 076 51 20 W |
| Granite Branch | Stream | | Baltimore | 39 19 46 N | 076 49 27 W |
| Granite Knoll Farms | Populated Place | 77 | Cecil | 39 37 32 N | 076 07 42 W |
| Granite Presbyterian Church | Church | 141 | Baltimore | 39 20 27 N | 076 51 17 W |
| Granny Finley Branch | Stream | | Queen Anne's | 39 07 48 N | 076 03 12 W |
| Granny Thompson School (historical) | School | 46 | Charles | 38 32 14 N | 077 10 25 W |
| Grannys Knob | Summit | 380 | Allegany | 39 42 15 N | 078 35 38 W |
| Grantham Hall | Populated Place | 36 | Calvert | 38 41 52 N | 076 37 10 W |
| Grantsville | Populated Place | 702 | Garrett | 39 41 42 N | 079 09 04 W |
| Grantsville Cemetery | Cemetery | 739 | Garrett | 39 41 42 N | 079 09 50 W |
| Grantsville Elementary School | School | 705 | Garrett | 39 41 44 N | 079 09 09 W |
| Grantsville Shopping Center | Locale | 725 | Garrett | 39 41 41 N | 079 09 35 W |
| Grantsville Volunteer Fire Department | Building | 554 | Garrett | 39 41 48 N | 079 24 28 W |
| Granville Creek | Bay | 6 | Anne Arundel | 38 57 25 N | 076 34 58 W |
| Grapevine Cove | Bay | 4 | Calvert | 38 23 38 N | 076 28 59 W |
| Grapevine Cove | Bay | -4 | Calvert | 38 24 47 N | 076 32 59 W |
| Grapevine Cove | Bay | -4 | Queen Anne's | 38 53 57 N | 076 09 55 W |
| Grapevine Island | Island | 51 | Montgomery | 39 03 08 N | 077 18 05 W |
| Grapevine Point | Cape | 3 | Queen Anne's | 38 54 03 N | 076 10 00 W |
| Grason Landing | Locale | 9 | St. Mary's | 38 09 41 N | 076 25 35 W |
| Grasonville | Populated Place | 5 | Queen Anne's | 38 57 29 N | 076 12 37 W |
| Grasonville Cemetery | Cemetery | 7 | Queen Anne's | 38 57 41 N | 076 11 08 W |
| Grasonville Cemetery | Cemetery | 6 | Queen Anne's | 38 57 33 N | 076 11 35 W |
| Grasonville Elementary School | School | 7 | Queen Anne's | 38 57 48 N | 076 11 05 W |
| Grasonville Medical Center | Hospital | 5 | Queen Anne's | 38 57 48 N | 076 13 10 W |
| Grasonville Park | Park | 5 | Queen Anne's | 38 57 17 N | 076 12 32 W |
| Grasonville Post Office | Post Office | 5 | Queen Anne's | 38 57 32 N | 076 12 25 W |
| Grasonville Senior Center | Building | 5 | Queen Anne's | 38 57 32 N | 076 12 08 W |
| Grasonville Seventh Day Adventist Church | Church | 5 | Queen Anne's | 38 57 49 N | 076 13 08 W |
| Grasonville Volunteer Fire Department Station Number 2 | Building | | Queen Anne's | 39 36 22 N | 076 21 15 W |
| Grasonville Volunteer Fire Depatment | Building | | Queen Anne's | 39 36 22 N | 076 21 16 W |
| Grassmere Estates | Populated Place | 187 | Carroll | 39 27 51 N | 076 55 58 W |
| Grassy Island (historical) | Island | 0 | Worcester | 38 21 42 N | 075 04 35 W |
| Grater Olivet Baptist Church | Church | 69 | Baltimore (city) | 39 17 38 N | 076 40 34 W |
| Gratitude | Populated Place | 3 | Kent | 39 08 26 N | 076 15 36 W |
| Gratitude Post Office (historical) | Post Office | 1 | Kent | 39 08 30 N | 076 15 39 W |
| Gratitude Yacht Harbor | Locale | -3 | Kent | 39 08 33 N | 076 15 40 W |
| Grave Run | Stream | | Baltimore | 39 39 16 N | 076 46 44 W |
| Grave Run Church | Church | 237 | Baltimore | 39 38 53 N | 076 48 22 W |
| Grave Run Mills (historical) | Locale | 189 | Baltimore | 39 39 17 N | 076 48 09 W |
| Gravel Hill | Populated Place | 521 | Garrett | 39 39 50 N | 079 23 35 W |
| Gravel Hill | Summit | 795 | Garrett | 39 42 07 N | 078 58 49 W |
| Gravel Run | Stream | | Dorchester | 38 41 13 N | 075 54 15 W |
| Gravel Run | Stream | | Queen Anne's | 39 03 00 N | 076 03 50 W |
| Gravelly Branch | Stream | | Caroline | 38 49 30 N | 075 51 10 W |
| Gravelly Branch | Stream | | Caroline | 38 59 45 N | 075 47 06 W |
| Gravelly Hills | Populated Place | 38 | St. Mary's | 38 22 25 N | 076 49 18 W |
| Gravelly Point | Cape | 0 | Dorchester | 38 17 12 N | 075 56 11 W |
| Gravelly Run | Stream | | Cecil | 39 37 45 N | 075 51 52 W |
| Gravelly Run | Stream | | Garrett | 39 32 14 N | 079 20 43 W |
| Gravely | Populated Place | 36 | Anne Arundel | 38 57 22 N | 076 38 05 W |
| Gravely Knoll School (historical) | School | 34 | St. Mary's | 38 27 34 N | 076 41 19 W |
| Gravely Run | Stream | | St. Mary's | 38 17 06 N | 076 36 38 W |
| Graves Point | Cape | 0 | Talbot | 38 42 37 N | 076 06 49 W |
| Graveyard Cove | Bay | 2 | Kent | 39 07 57 N | 076 10 43 W |
| Graveyard Creek | Stream | | Harford | 39 37 09 N | 076 12 52 W |
| Graveyard Point | Cape | 0 | Anne Arundel | 39 07 37 N | 076 27 01 W |
| Graveyard Point | Cape | 1 | St. Mary's | 38 08 35 N | 076 27 55 W |
| Gray | Populated Place | 100 | Howard | 39 15 26 N | 076 47 08 W |
| Gray Haven | Populated Place | 7 | Baltimore | 39 16 09 N | 076 29 10 W |
| Gray Manor | Populated Place | 9 | Baltimore | 39 16 39 N | 076 29 41 W |
| Gray Manor First Evangelical Lutheran Church | Church | 7 | Baltimore | 39 16 32 N | 076 29 40 W |
| Gray Manor School | School | 9 | Baltimore | 39 16 35 N | 076 29 54 W |
| Gray Point | Cape | 0 | St. Mary's | 38 05 33 N | 076 23 16 W |
| Gray Residence Hall | Building | 603 | Allegany | 39 38 59 N | 078 55 49 W |
| Gray Rock | Populated Place | 121 | Howard | 39 16 08 N | 076 50 08 W |
| Gray Rock Farms | Populated Place | 126 | Howard | 39 16 08 N | 076 50 40 W |
| Grays Corner | Populated Place | 3 | Worcester | 38 20 55 N | 075 10 13 W |