1. United States Postal Service 205 E Oak St Ste 103, Sisseton, SD 57262 Coordinate: 45.6648,-97.04827 Phone: (800) 275-8777
2. The UPS Store 2211 Sd Highway 10, Sisseton, SD 57262 Coordinate: 45.66014,-97.02269 Phone: (605) 428-5959