6 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Upland | San Bernardino County | 79,843 |
| Union City | Alameda County | 65,261 |
| Ukiah | Mendocino County | 15,946 |
| University of California-Santa Barbara | Santa Barbara County | 13,424 |
| University of California-Davis | Solano County | 8,523 |
| Upper Lake | Lake County | 1,227 |