| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Icarid historical | city | Iowa | United States | 40.99528 | -94.68722 | 1249 | 607 |
| Iconium | city | Iowa | United States | 40.89139 | -92.955 | 967 | 529 |
| Ida Grove | city | Iowa | United States | 42.345 | -95.47139 | 1246 | 2326 |
| Illinois Grove | city | Iowa | United States | 42.19083 | -93.22333 | 1049 | 749 |
| Illyria | city | Iowa | United States | 42.89861 | -91.635 | 1174 | 844 |
| Imogene | city | Iowa | United States | 40.87944 | -95.42667 | 1125 | 623 |
| Independence | city | Iowa | United States | 42.46861 | -91.88917 | 889 | 7391 |
| Indian Ridge Mobile Home Park | city | Iowa | United States | 41.35972 | -93.56389 | 898 | 13295 |
| Indiana | city | Iowa | United States | 41.20444 | -93.025 | 905 | 937 |
| Indianapolis | city | Iowa | United States | 41.39694 | -92.43333 | 807 | 698 |
| Indianola | city | Iowa | United States | 41.35806 | -93.55722 | 951 | 13295 |
| Indianola Junction | city | Iowa | United States | 41.04028 | -93.35639 | 1023 | 2650 |
| Indiantown historical | city | Iowa | United States | 41.3125 | -95.10778 | 1249 | 1144 |
| Ingersoll historical | city | Iowa | United States | 41.73194 | -93.82083 | 849 | 3456 |
| Inwood | city | Iowa | United States | 43.30722 | -96.43167 | 1463 | 773 |
| Ioka historical | city | Iowa | United States | 41.1825 | -92.12889 | 839 | 754 |
| Iola historical | city | Iowa | United States | 41.33278 | -95.37972 | 1249 | 705 |
| Ion | city | Iowa | United States | 43.11278 | -91.26194 | 859 | 605 |
| Ionia | city | Iowa | United States | 43.03417 | -92.45583 | 1145 | 813 |
| Iowa Center | city | Iowa | United States | 41.92861 | -93.405 | 902 | 1947 |
| Iowa City | city | Iowa | United States | 41.66111 | -91.53 | 662 | 61106 |
| Iowa Falls | city | Iowa | United States | 42.5225 | -93.25111 | 1112 | 4545 |
| Iowa Falls Junction | city | Iowa | United States | 42.51528 | -93.26333 | 1099 | 4545 |
| Iowa Junction historical | city | Iowa | United States | 41.4925 | -91.535 | 597 | 1849 |
| Ira | city | Iowa | United States | 41.77778 | -93.20556 | 902 | 915 |
| Ireton | city | Iowa | United States | 42.97472 | -96.31806 | 1400 | 1334 |
| Ironhills | city | Iowa | United States | 42.14167 | -90.76972 | 898 | 574 |
| Irving | city | Iowa | United States | 41.94833 | -92.295 | 895 | 2035 |
| Irvington | city | Iowa | United States | 43.0075 | -94.19528 | 1141 | 2385 |
| Irwin | city | Iowa | United States | 41.79167 | -95.20556 | 1246 | 575 |
| Ivester | city | Iowa | United States | 42.33972 | -92.94389 | 1125 | 898 |
| Iveyville | city | Iowa | United States | 40.90083 | -94.79556 | 1282 | 781 |
| Ivy | city | Iowa | United States | 41.60056 | -93.41694 | 872 | 9991 |
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