14 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Independence | Jackson County | 121,021 |
| Imperial | Jefferson County | 5,827 |
| Ironton | Iron County | 1,431 |
| Indian Lake | Crawford County | 1,323 |
| Iberia | Miller County | 727 |
| Innsbrook | Lincoln County | 688 |
| Iron Mountain Lake | St. Francois County | 639 |
| Indian Point | Stone County | 596 |
| Irondale | Washington County | 368 |
| Iantha | Barton County | 79 |
| Ionia | Benton County | 79 |
| Irwin | Barton County | 46 |
| Iatan | Platte County | 44 |
| Irena | Harrison County | 12 |