There are 2 Post Offices in Buffalo County, South Dakota, serving a population of 2,048 people in an area of 472 square miles. There is 1 Post Office per 1,024 people, and 1 Post Office per 235 square miles.
In South Dakota, Buffalo County is ranked 38th of 66 counties in Post Offices per capita, and 39th of 66 counties in Post Offices per square mile.
Find addresses, phone numbers, fax numbers, hours & services for Buffalo County Post Offices.
United States Postal Service 229 Main Street Gann Valley, SD Mailing Service, Postal Services
United States Postal Service 119 Sd Highway 249 Fort Thompson, SD Mailing Service, Postal Services