Post Offices List in Wayne County, Missouri:
| Greenville Post Office | 111 Main St, Greenville, MO 63944 |
| Lowndes Post Office | 13066 Wayne Rte E, Lowndes, MO 63951 |
| Patterson Post Office | 1234 Old State Route 34, Patterson, MO 63956 |
| Piedmont Post Office | 125 W Green St, Piedmont, MO 63957 |
| Silva Post Office | 662 Wayne 219, Silva, MO 63964 |
| Wappapello Post Office | 700 State Highway D, Wappapello, MO 63966 |
| Williamsville Post Office | 100 N Highway A St, Williamsville, MO 63967 |