- Garner (Population: 2,922)
- George (Population: 1,051)
- Gladbrook (Population: 1,015)
- Glenwood (Population: 5,358)
- Glidden (Population: 1,253)
- Gowrie (Population: 1,038)
- Greene (Population: 1,099)
- Greenfield (Population: 2,129)
- Grimes (Population: 5,098)
- Grinnell (Population: 9,105)
- Griswold (Population: 1,039)
- Grundy Center (Population: 2,596)
- Guthrie Center (Population: 1,668)
- Guttenberg (Population: 1,987)
