Post Offices List in Walnut Creek City, California:
| Rossmoor Post Office | 1922 Tice Valley Blvd, Walnut Creek, CA 94595 |
| Walnut Creek Post Office | 2070 N Broadway, Walnut Creek, CA 94596 |
| Ygnacio Valley Post Office | 2244 Oak Grove Rd, Walnut Creek, CA 94598 |