| Post Office Name | US Post Office |
| Address | 201 N Main St |
| City | Groton |
| State | South Dakota |
| Phone Number | (605) 397-2707 |
| Latitude | 45.4583 |
| Longitude | -98.1109 |
57445 US Post Office in Groton, South Dakota is located at 201 N Main St. The Groton Post Office Number is (605) 397-2707
