Post Offices List in San Mateo City, California:
| 25th Avenue Post Office | 135 W 25th Ave, San Mateo, CA 94403 |
| Saint Matthew Post Office | 210 S Ellsworth Ave, San Mateo, CA 94401 |
| San Mateo Post Office | 1630 S Delaware St, San Mateo, CA 94402 |
| Foster City New Post Office | 750 Alma Ln Ste 100, San Mateo, CA 94404 |