| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Gaither | city | Maryland | United States | 39.36 | -76.99 | 830 | |
| Gaither Farm Estates | city | Maryland | United States | 39.24 | -76.90 | 830 | |
| Gaither Heights | city | Maryland | United States | 39.37 | -77.00 | 830 | |
| Gaither Manor | city | Maryland | United States | 39.37 | -76.99 | 830 | |
| Gaithersburg | city | Maryland | United States | 39.14 | -77.20 | 830 | |
| Gaithersburgum | city | Maryland | United States | 39.14 | -77.20 | 830 | |
| Galena | city | Maryland | United States | 39.34 | -75.88 | 49 | |
| Galestown | city | Maryland | United States | 38.57 | -75.71 | 13 | |
| Galesville | city | Maryland | United States | 38.84 | -76.54 | 3 | |
| Galesville Estates | city | Maryland | United States | 38.84 | -76.55 | 3 | |
| Gallagher Estates | city | Maryland | United States | 39.43 | -77.19 | 830 | |
| Gallagher Park | city | Maryland | United States | 39.36 | -76.61 | 347 | |
| Gallant Acres | city | Maryland | United States | 38.59 | -76.81 | 177 | |
| Gallant Green Woods | city | Maryland | United States | 38.59 | -76.77 | 141 | |
| Gallions Corner | city | Maryland | United States | 39.65 | -76.24 | 360 | |
| Galt | city | Maryland | United States | 39.69 | -77.14 | 830 | |
| Gamber | city | Maryland | United States | 39.46 | -76.93 | 830 | |
| Gambrill South | city | Maryland | United States | 39.47 | -77.52 | 830 | |
| Gambrills | city | Maryland | United States | 39.07 | -76.67 | 147 | |
| Gannon | city | Maryland | United States | 39.51 | -79.04 | 1669 | |
| Gapgalleon | city | Maryland | United States | 39.21 | -76.66 | 147 | |
| Gapland | city | Maryland | United States | 39.40 | -77.66 | 830 | |
| Garden Estates | city | Maryland | United States | 38.58 | -76.10 | 3 | |
| Garden Estates | city | Maryland | United States | 38.52 | -77.10 | 98 | |
| Garden Village Park | city | Maryland | United States | 39.33 | -76.53 | 147 | |
| Gardenspot | city | Maryland | United States | 39.69 | -77.75 | 830 | |
| Gardenville | city | Maryland | United States | 39.33 | -76.56 | 147 | |
| Gareys (historical) | city | Maryland | United States | 38.92 | -75.76 | 45 | |
| Garfield | city | Maryland | United States | 39.60 | -77.52 | 1669 | |
| Garfield Manor | city | Maryland | United States | 39.24 | -77.18 | 830 | |
| Garland | city | Maryland | United States | 39.59 | -76.17 | 347 | |
| Garland | city | Maryland | United States | 39.19 | -76.64 | 52 | |
| Garland Park | city | Maryland | United States | 39.19 | -76.65 | 98 | |
| Garrett Park | city | Maryland | United States | 39.04 | -77.09 | 259 | |
| Garrett Park Estates | city | Maryland | United States | 39.04 | -77.10 | 249 | |
| Garretts Mill | city | Maryland | United States | 39.35 | -77.68 | 830 | |
| Garrian Orchards | city | Maryland | United States | 39.24 | -76.80 | 830 | |
| Garrison | city | Maryland | United States | 39.41 | -76.76 | 830 | |
| Garrison Farms | city | Maryland | United States | 39.40 | -76.72 | 830 | |
| Garrison Forest | city | Maryland | United States | 39.42 | -76.77 | 830 | |
| Garrison Ridge | city | Maryland | United States | 39.42 | -76.79 | 830 | |
| Gary | city | Maryland | United States | 39.26 | -77.01 | 830 | |
| Gasnell Estates | city | Maryland | United States | 39.45 | -77.08 | 830 | |
| Gatewater | city | Maryland | United States | 39.17 | -76.59 | 3 | |
| Gateway | city | Maryland | United States | 39.61 | -77.41 | 830 | |
| Gateway Mobile Home Park | city | Maryland | United States | 38.44 | -75.57 | 32 | |
| Gatts Corner | city | Maryland | United States | 38.89 | -76.51 | 3 | |
| Gayfields | city | Maryland | United States | 39.11 | -77.04 | 347 |