Post Offices List in Madison County, Iowa:
| Earlham Post Office | 125 E 1st St, Earlham, IA 50072 |
| Macksburg Post Office | 104 E North St, Macksburg, IA 50155 |
| Saint Charles Post Office | 129 W Main St, Saint Charles, IA 50240 |
| Truro Post Office | 200 E North St, Truro, IA 50257 |
| Winterset Post Office | 120 N 2nd Ave, Winterset, IA 50273 |