24 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Kerman | Fresno County | 17,860 |
| King City | Monterey County | 14,061 |
| Kingsburg | Fresno County | 13,303 |
| Kentfield | Marin County | 7,227 |
| Kensington | Alameda County | 5,325 |
| Keyes | Stanislaus County | 5,288 |
| Kelseyville | Lake County | 4,335 |
| Kelly Ridge | Butte County | 3,082 |
| Kennedy | San Joaquin County | 2,611 |
| Kings Beach | Placer County | 2,293 |
| Knightsen | Contra Costa County | 2,087 |
| Knights Landing | Yolo County | 1,131 |
| Klamath | Del Norte County | 822 |
| Kettleman City | Kings County | 816 |
| Kenwood | Sonoma County | 707 |
| Kernville | Kern County | 579 |
| Keene | Kern County | 455 |
| Kirkwood | Alpine County | 444 |
| Keswick | Shasta County | 128 |
| Kennedy Meadows | Inyo County | 107 |
| Knights Ferry | San Joaquin County | 93 |
| Keddie | Plumas County | 70 |
| Keeler | Inyo County | 24 |
| Kep'el | Humboldt County | 18 |