Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Huxley | Huxley, IA |
| Iowa | Ida Grove | Ida Grove, IA |
| Iowa | Imogene | Imogene, IA |
| Iowa | Independence | Independence, IA |
| Iowa | Indianola | Indianola, IA |
| Iowa | Inwood | Inwood, IA |
| Iowa | Ionia | Ionia, IA |
| Iowa | Iowa City | Iowa City, IA |
| Iowa | Iowa Falls | Iowa Falls, IA |
| Iowa | Ira | Ira, IA |
| Iowa | Ireton | Ireton, IA |
| Iowa | Irwin | Irwin, IA |
| Iowa | Jamaica | Jamaica, IA |
| Iowa | James | James, IA |
| Iowa | Janesville | Janesville, IA |
| Iowa | Jefferson | Jefferson, IA |
| Iowa | Jesup | Jesup, IA |
| Iowa | Jewell | Jewell, IA |
| Iowa | Johnston | Johnston, IA |
| Iowa | Joice | Joice, IA |
| Iowa | Jolley | Jolley, IA |
| Iowa | Kalona | Kalona, IA |
| Iowa | Kamrar | Kamrar, IA |
| Iowa | Kanawha | Kanawha, IA |
| Iowa | Kellerton | Kellerton, IA |