| Locality | Post Code |
|---|---|
| Bard, Imperial | 92222 |
| Bombay Beach, Imperial | 92257 |
| Bonds Corner, Imperial | 92250 |
| Brawley, Imperial | 92227 |
| Calexico, Imperial | 92231 |
| Calipatria, Imperial | 92233 |
| El Centro, Imperial | 92243 |
| Felicity, Imperial | 92283 |
| Heber, Imperial | 92249 |
| Holtville, Imperial | 92250 |
| Imperial, Imperial | 92251 |
| Mount Signal, Imperial | 92231 |
| Niland, Imperial | 92257 |
| Ocotillo, Imperial | 92259 |
| Palo Verde, Imperial | 92266 |
| Salton City, Imperial | 92275 |
| Seeley, Imperial | 92273 |
| Thermal, Imperial | 92275 |
| Westmorland, Imperial | 92281 |
| Winterhaven, Imperial | 92283 |