- Gaithersburg
- Galena
- Galestown
- Galesville
- Gambrills
- Gapland
- Garrett Park
- Garretts Mill
- Garrison
- Georgetown
- Germantown
- Gilmore
- Girdletree
- Glassmanor
- Glen Burnie
- Glen Echo
- Glen Echo Heights
- Glenarden
- Glenmont
- Glenn Dale
- Goddard
- Golden Beach
- Goldsboro
- Gorman
- Grahamtown
- Grantsville
- Grasonville
- Greater Upper Marlboro
- Green Haven
- Green Valley
- Greenbelt
- Greensboro
- Greensburg
- Gwynn Oak
