Custer County Post Offices

200 N Walnut St
Buffalo Gap, South Dakota 57722

643 Mount Rushmore Rd
Custer, South Dakota 57730

120 Oak St
Fairburn, South Dakota 57738

208 Main St
Hermosa, South Dakota 57744

369 Main St
Pringle, South Dakota 57773

Custer County

There are 5 US Post Offices in Custer County serving a total of 8,139 residents equating to 1,628 residents per post office. It's estimated that approximately 12,991 packages are handled across the 5 county post offices annually. Custer County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 8,216. Its county seat is Custer. The county was created in 1875 and organized in 1877. Custer County is included in the Rapid City, SD Metropolitan Statistical Area."