1. Dakota International Service
110 E Center St, Madison, SD 57042
Coordinate: 44.00521,-97.11377
Phone: (605) 427-5863
2. US Post Office
741 S Washington Ave, Madison, SD 57042
Coordinate: 44.011738,-97.109795
Phone: (800) 275-8777
3. United States Postal Service
119 E Center St, Madison, SD 57042
Coordinate: 44.00493,-97.11365
Phone: (800) 275-8777