22 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Kansas City | Jackson County | 520,000 |
| Kirkwood | St. Louis County | 29,293 |
| Kirksville | Adair County | 18,002 |
| Kearney | Clay County | 11,590 |
| Kennett | Dunklin County | 9,956 |
| Knob Noster | Johnson County | 3,018 |
| Kimberling City | Stone County | 2,381 |
| Kahoka | Clark County | 1,977 |
| Kissee Mills | Taney County | 1,199 |
| King City | Gentry County | 849 |
| Kelso | Scott County | 551 |
| Keytesville | Chariton County | 447 |
| Kingston | Caldwell County | 293 |
| Kidder | Caldwell County | 274 |
| Kinloch | St. Louis County | 260 |
| Kingsville | Johnson County | 252 |
| Kirbyville | Taney County | 205 |
| Koshkonong | Oregon County | 197 |
| Knox City | Knox County | 187 |
| Kingdom City | Callaway County | 137 |
| Kimmswick | Jefferson County | 129 |
| Knob Lick | St. Francois County | 97 |