| Post Office Name | US Post Office |
| Address | 715 Main St |
| City | Webster |
| State | South Dakota |
| Phone Number | (605) 345-3121 |
| Latitude | 45.2988 |
| Longitude | -97.5074 |
57274 US Post Office in Webster, South Dakota is located at 715 Main St. The Webster Post Office Number is (605) 345-3121