Post Offices List in St. Lucie County, Florida:
| Fort Pierce Post Office | 5000 W Midway Rd, Fort Pierce, FL 34981 |
| Orange Avenue Post Office | 1717 Orange Ave, Fort Pierce, FL 34950 |
| Port Saint Lucie Midport Post Office | 2255 Se Veterans Memorial Pkwy, Port Saint Lucie, FL 34952 |
| Port Saint Lucie Post Office | 290 Nw Peacock Blvd, Port Saint Lucie, FL 34986 |