Montana Cities
- Gage, MT
- Galata, MT
- Galbraith, MT
- Galen, MT
- Gallatin Gateway, MT
- Gallatin River Ranch, MT
- Gallup City, MT
- Gardiner, MT
- Garland, MT
- Garneill, MT
- Garnet, MT
- Garrison, MT
- Garryowen, MT
- Gearing, MT
- Georgetown, MT
- Geraldine, MT
- Gerber, MT
- Geyser, MT
- Gibbtown, MT
- Gibson Flats, MT
- Giffen, MT
- Gildford, MT
- Gildford Colony, MT
- Gilman, MT
- Gilroy, MT
- Giltedge, MT
- Girard, MT
- Gird Point, MT
- Glacier Colony, MT
- Glasgow, MT
- Glen, MT
- Glendale, MT
- Glendale Colony, MT
- Glendive, MT
- Glengarry, MT
- Glentana, MT
- Gloster, MT
- Gold Butte, MT
- Gold Creek, MT
- Goldcreek, MT
- Golden Ridge, MT
- Golden Valley Colony, MT
- Goldstone, MT
- Gordon, MT
- Gorus, MT
- Grace, MT
- Granite, MT
- Grannis, MT
- Grant, MT
- Grantsdale, MT
- Grass Range, MT
- Grass Valley, MT
- Grayling, MT
- Great Falls, MT
- Greenfield, MT
- Greenough, MT
- Greenwood, MT
- Gregson, MT
- Greycliff, MT
- Groveland, MT
- Gunsight, MT
