- Galt
- Galva
- Garber
- Garden City
- Garden Grove
- Garnavillo
- Garner
- Garrison
- Garwin
- Geneva
- Geneva
- George
- Gibson
- Gilbert
- Gilbertville
- Gillett Grove
- Gilman
- Gilmore City
- Gladbrook
- Glenwood
- Glidden
- Goldfield
- Goodell
- Goose Lake
- Gowrie
- Graettinger
- Graf
- Grafton
- Grand Junction
- Grand Mound
- Grand River
- Grandview
- Granger
- Grant
- Granville
- Gravity
- Gray
- Greeley
- Green Island
- Green Mountain
- Greene
- Greenfield
- Greenville
- Grimes
- Grinnell
- Griswold
- Grundy Center
- Gruver
- Guernsey
- Guthrie Center
- Guttenberg
