| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Idlewild | city | Wisconsin | United States | 44.88833 | -87.42722 | 580 | 1642 |
| Idlewood Beach | city | Wisconsin | United States | 43.60139 | -87.76528 | 577 | 3062 |
| Iduna | city | Wisconsin | United States | 44.19861 | -91.3125 | 810 | 1351 |
| Imalone | city | Wisconsin | United States | 45.55222 | -91.22722 | 1135 | 355 |
| Independence | city | Wisconsin | United States | 44.35694 | -91.42028 | 784 | 1342 |
| Indian Creek | city | Wisconsin | United States | 45.70528 | -92.20722 | 1062 | 764 |
| Indian Heights | city | Wisconsin | United States | 42.85222 | -89.01806 | 797 | 4122 |
| Indian Hills | city | Wisconsin | United States | 43.80472 | -88.98972 | 846 | 2089 |
| Indian Shores | city | Wisconsin | United States | 44.13917 | -88.70167 | 784 | 2758 |
| Indianford | city | Wisconsin | United States | 42.80417 | -89.09111 | 793 | 5429 |
| Ingersoll | city | Wisconsin | United States | 44.85194 | -89.25972 | 1249 | 976 |
| Ingle | city | Wisconsin | United States | 43.62444 | -89.12778 | 958 | 1264 |
| Ingram | city | Wisconsin | United States | 45.505 | -90.81222 | 1309 | 397 |
| Inlet | city | Wisconsin | United States | 42.62722 | -88.585 | 938 | 12638 |
| Ino | city | Wisconsin | United States | 46.53083 | -91.17861 | 951 | 372 |
| Institute | city | Wisconsin | United States | 44.89333 | -87.28694 | 688 | 2400 |
| Interwald | city | Wisconsin | United States | 45.22389 | -90.11639 | 1433 | 738 |
| Iola | city | Wisconsin | United States | 44.50806 | -89.13056 | 948 | 1763 |
| Ipswich | city | Wisconsin | United States | 42.7075 | -90.41028 | 1000 | 1740 |
| Irma | city | Wisconsin | United States | 45.35139 | -89.66639 | 1496 | 1034 |
| Iron Belt | city | Wisconsin | United States | 46.40056 | -90.32417 | 1683 | 331 |
| Iron Ridge | city | Wisconsin | United States | 43.39972 | -88.5325 | 974 | 2075 |
| Iron River | city | Wisconsin | United States | 46.56444 | -91.40806 | 1148 | 295 |
| Ironton | city | Wisconsin | United States | 43.54611 | -90.14111 | 944 | 1310 |
| Irvine | city | Wisconsin | United States | 44.92556 | -91.41972 | 853 | 12473 |
| Irving | city | Wisconsin | United States | 44.19 | -90.90111 | 734 | 566 |
| Irvington | city | Wisconsin | United States | 44.83611 | -91.95444 | 921 | 13151 |
| Isaar | city | Wisconsin | United States | 44.57167 | -88.28444 | 820 | 3322 |
| Island Beach | city | Wisconsin | United States | 44.09111 | -88.50278 | 748 | 10264 |
| Island Lake | city | Wisconsin | United States | 45.31889 | -91.36889 | 1105 | 753 |
| Island Park | city | Wisconsin | United States | 44.02278 | -88.80222 | 754 | 1387 |
| Itasca | city | Wisconsin | United States | 46.67472 | -92.00639 | 639 | 8761 |
| Ithaca | city | Wisconsin | United States | 43.34083 | -90.28167 | 748 | 1348 |
| Ives | city | Wisconsin | United States | 42.77 | -87.80528 | 662 | 83395 |
| Ives Grove | city | Wisconsin | United States | 42.72917 | -87.96611 | 774 | 7367 |
| Ixonia | city | Wisconsin | United States | 43.14389 | -88.59722 | 849 | 2829 |
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