22 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Kansas City | Jackson County | 518,016 |
| Kirkwood | St. Louis County | 29,320 |
| Kirksville | Adair County | 17,921 |
| Kearney | Clay County | 11,402 |
| Kennett | Dunklin County | 10,046 |
| Knob Noster | Johnson County | 2,975 |
| Kimberling City | Stone County | 2,376 |
| Kahoka | Clark County | 1,975 |
| Kissee Mills | Taney County | 1,138 |
| King City | Gentry County | 840 |
| Kelso | Scott County | 552 |
| Keytesville | Chariton County | 447 |
| Kingston | Caldwell County | 294 |
| Kidder | Caldwell County | 273 |
| Kinloch | St. Louis County | 261 |
| Kingsville | Johnson County | 250 |
| Kirbyville | Taney County | 204 |
| Koshkonong | Oregon County | 196 |
| Knox City | Knox County | 187 |
| Kingdom City | Callaway County | 136 |
| Kimmswick | Jefferson County | 130 |
| Knob Lick | St. Francois County | 24 |