Post Offices List in Fontana City, California:
| Fontana Post Office | 8282 Sierra Ave, Fontana, CA 92335 |
| Southside Post Office | 16731 Santa Ana Ave, Fontana, CA 92337 |
| Fontana Post Office | 8282 Sierra Ave, Fontana, CA 92335 |
| Southside Post Office | 16731 Santa Ana Ave, Fontana, CA 92337 |