City levels are determined by the county in which they are located. If the city is not named below, it may be located within a county listed below. Visit the National Association of Counties website and type the city name into the "City/Zip Search" tab to determine the city's county. If the city is not listed below or is not located in a county below, that city is a Level 1.
| Level | City | County |
|---|---|---|
| 4 | Antioch / Brentwood / Concord | Contra Costa |
| 3 | Bakersfield / Ridgecrest | Kern |
| 2 | Barstow / Ontario / Victorville | San Bernardino |
| 4 | Death Valley | Inyo |
| 4 | Eureka / Arcata / McKinleyville | Humboldt |
| 4 | Fresno | Fresno |
| 4 | Los Angeles | Los Angeles / Orange / Ventura |
| 4 | Mammoth Lakes | Mono |
| 4 | Mill Valley / San Rafael / Novato | Marin |
| 4 | Monterey | Monterey |
| 4 | Napa | Napa |
| 4 | Oakhurst | Madera |
| 4 | Oakland | Alameda |
| 4 | Palm Springs | Riverside |
| 4 | Point Arena / Gualala | Mendocino |
| 4 | Sacramento | Sacramento |
| 4 | San Diego | San Diego |
| 4 | San Francisco | San Francisco |
| 4 | San Luis Obispo | San Luis Obispo |
| 4 | San Mateo / Foster City / Belmont | San Mateo |
| 4 | Santa Barbara | Santa Barbara |
| 3 | Santa Cruz | Santa Cruz |
| 4 | Santa Monica | City Limits of Santa Monica |
| 4 | Santa Rosa | Sonoma |
| 4 | South Lake Tahoe | El Dorado |
| 4 | Stockton | San Joaquin |
| 4 | Sunnyvale / Palo Alto / San Jose | Santa Clara |
| 4 | Tahoe City | Placer |
| 4 | Truckee | Nevada |
| 3 | Visalia / Lemoore | Tulare / Kings |
| 4 | West Sacramento / Davis | Yolo |
| 4 | Yosemite National Park | Mariposa |