| Post Office Name | US Post Office |
| Address | 408 S A Ave |
| City | New Underwood |
| State | South Dakota |
| Phone Number | (605) 754-6456 |
| Latitude | 43.9974 |
| Longitude | -102.7169 |
57761 US Post Office in New Underwood, South Dakota is located at 408 S A Ave. The New Underwood Post Office Number is (605) 754-6456
