Post Offices List in Westminster City, California:
| Bolsa Post Office | 9317 Bolsa Ave, Westminster, CA 92684 |
| Goldenwest Post Office | 13761 Goldenwest St, Westminster, CA 92684 |
| Westminster Post Office | 15030 Goldenwest Cir, Westminster, CA 92685 |
| Westminster Mall Post Office | 2014 Westminster Mall, Westminster, CA 92683 |