| Post Office Name | US Post Office |
| Address | 119 Calumet Ave SE |
| City | De Smet |
| State | South Dakota |
| Phone Number | (605) 854-3440 |
| Latitude | 44.3680 |
| Longitude | -97.5874 |
57231 US Post Office in De Smet, South Dakota is located at 119 Calumet Ave SE. The De Smet Post Office Number is (605) 854-3440
