25 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Kerman | Fresno County | 18,037 |
| King City | Monterey County | 14,293 |
| Kingsburg | Fresno County | 13,409 |
| Kentfield | Marin County | 7,641 |
| Keyes | Stanislaus County | 5,883 |
| Kensington | Alameda County | 5,367 |
| Kelseyville | Lake County | 3,947 |
| Kelly Ridge | Butte County | 3,324 |
| Kennedy | San Joaquin County | 2,332 |
| Kings Beach | Placer County | 2,287 |
| Knightsen | Contra Costa County | 1,666 |
| Knights Landing | Yolo County | 985 |
| Klamath | Del Norte County | 960 |
| Kettleman City | Kings County | 835 |
| Kernville | Kern County | 696 |
| Kenwood | Sonoma County | 504 |
| Keene | Kern County | 397 |
| Kirkwood | Alpine County | 272 |
| Kennedy Meadows | Inyo County | 116 |
| Knights Ferry | San Joaquin County | 90 |
| Keddie | Plumas County | 84 |
| Kingvale | Nevada County | 71 |
| Keswick | Shasta County | 60 |
| Keeler | Inyo County | 35 |
| Kep'el | Humboldt County | 24 |