Post Offices List in Petaluma City, California:
| Casa Grande Annex Post Office | 1601 Corporate Cir, Petaluma, CA 94954 |
| Petaluma Post Office | 120 4th St, Petaluma, CA 94952 |
| Two Rock Coast Guard Station Post Office | 599 Tomales Rd, Petaluma, CA 94952 |
| North Bay P&DC Finance Post Office | 1150 N Mcdowell Blvd, Petaluma, CA 94999 |