| Post Office Name | US Post Office |
| Address | 336 1st Ave |
| City | Ipswich |
| State | South Dakota |
| Phone Number | (605) 426-6091 |
| Latitude | 45.4188 |
| Longitude | -99.0275 |
57451 US Post Office in Ipswich, South Dakota is located at 336 1st Ave. The Ipswich Post Office Number is (605) 426-6091
