| Post Office Name | US Post Office |
| Address | 101 W Main St |
| City | Ashton |
| State | South Dakota |
| Phone Number | (605) 472-2114 |
| Latitude | 45.0270 |
| Longitude | -98.4720 |
57424 US Post Office in Ashton, South Dakota is located at 101 W Main St. The Ashton Post Office Number is (605) 472-2114