24 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Kerman | Fresno County | 18,224 |
| King City | Monterey County | 14,203 |
| Kingsburg | Fresno County | 13,478 |
| Kentfield | Marin County | 7,276 |
| Kensington | Alameda County | 5,342 |
| Keyes | Stanislaus County | 5,267 |
| Kelseyville | Lake County | 4,400 |
| Kelly Ridge | Butte County | 3,118 |
| Kennedy | San Joaquin County | 2,568 |
| Kings Beach | Placer County | 2,192 |
| Knightsen | Contra Costa County | 2,122 |
| Knights Landing | Yolo County | 1,140 |
| Klamath | Del Norte County | 825 |
| Kettleman City | Kings County | 774 |
| Kenwood | Sonoma County | 686 |
| Kernville | Kern County | 525 |
| Kirkwood | Alpine County | 463 |
| Keene | Kern County | 457 |
| Kennedy Meadows | Inyo County | 114 |
| Keswick | Shasta County | 106 |
| Knights Ferry | San Joaquin County | 100 |
| Keddie | Plumas County | 75 |
| Keeler | Inyo County | 26 |
| Kep'el | Humboldt County | 20 |