- Iveyville
- Ion
- Irving
- Island 176
- Island 178
- Island 186
- Island 188
- Island 189
- Indianola
- Ionia
- Independence
- Inwood
- Irwin
- Illyria
- Ivy
- Ida Grove
- Imogene
- Iowa City
- Iowa Falls
- Iconium
- Ira
- Irvington
- Ireton
- Iowa Center
- Ivester
- Iowa Falls Junction
- Indian Ridge Mobile Home Park
- Ironhills
- Indianola Junction
- Indianapolis