| Post Office Name | US Post Office |
| Address | 611 Jefferson Ave |
| City | Frankfort |
| State | South Dakota |
| Phone Number | (605) 472-1339 |
| Latitude | 44.7634 |
| Longitude | -98.2811 |
57440 US Post Office in Frankfort, South Dakota is located at 611 Jefferson Ave. The Frankfort Post Office Number is (605) 472-1339
