22 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Kansas City | Clay County | 512,360 |
| Kirkwood | St. Louis County | 28,988 |
| Kirksville | Adair County | 17,461 |
| Kearney | Clay County | 11,458 |
| Kennett | Dunklin County | 9,869 |
| Knob Noster | Johnson County | 2,962 |
| Kimberling City | Stone County | 2,425 |
| Kahoka | Clark County | 1,980 |
| Kissee Mills | Taney County | 1,138 |
| King City | Gentry County | 852 |
| Kelso | Scott County | 548 |
| Keytesville | Chariton County | 445 |
| Kingston | Caldwell County | 295 |
| Kidder | Caldwell County | 274 |
| Kinloch | St. Louis County | 256 |
| Kingsville | Johnson County | 247 |
| Kirbyville | Taney County | 202 |
| Koshkonong | Oregon County | 200 |
| Knox City | Knox County | 187 |
| Kingdom City | Callaway County | 136 |
| Kimmswick | Jefferson County | 134 |
| Knob Lick | St. Francois County | 24 |