Post Offices List in Assumption Parish County, Louisiana:
| Belle Rose Post Office | 7101 Highway 1, Belle Rose, LA 70341 |
| Labadieville Post Office | 2643 Highway 1, Labadieville, LA 70372 |
| Napoleonville Post Office | 181 Highway 401, Napoleonville, LA 70390 |
| Paincourtville Post Office | 6075 Highway 1, Paincourtville, LA 70391 |
| Pierre Part Post Office | 3511 Highway 70 S, Pierre Part, LA 70339 |
| Plattenville Post Office | 220 Highway 70 Spur, Plattenville, LA 70393 |