| Post Office Name | US Post Office |
| Address | 16946 S Dakota 34 |
| City | Union Center |
| State | South Dakota |
| Phone Number | (605) 985-5503 |
| Latitude | 44.6530 |
| Longitude | -102.8470 |
57787 US Post Office in Union Center, South Dakota is located at 16946 S Dakota 34. The Union Center Post Office Number is (605) 985-5503
