Post Offices List in Oceanside City, California:
| Brooks Street Post Office | 211 Brooks St, Oceanside, CA 92054 |
| First Street Post Office | 517 Seagaze Dr, Oceanside, CA 92054 |
| Oceanside Post Office | 1895 Avenida Del Oro, Oceanside, CA 92056 |
| San Luis Rey Post Office | 3774 Mission Ave, Oceanside, CA 92058 |