13 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Yuba City | Sutter County | 68,917 |
| Yorba Linda | Orange County | 66,053 |
| Yucaipa | San Bernardino County | 54,429 |
| Yucca Valley | San Bernardino County | 21,881 |
| Yreka | Siskiyou County | 7,656 |
| Yosemite Lakes | Madera County | 5,302 |
| Yountville | Napa County | 3,243 |
| Yosemite Valley | Mariposa County | 1,912 |
| Yermo | San Bernardino County | 1,226 |
| Yankee Hill | Butte County | 314 |
| Yolo | Yolo County | 239 |
| Yettem | Tulare County | 82 |
| Yosemite West | Mariposa County | 36 |