There are 3 US Post Offices in Miner County serving a total of 2,096 residents equating to 699 residents per post office. It's estimated that approximately 3,345 packages are handled across the 3 county post offices annually. Miner County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 2,389. Its county seat is Howard. The county was created in 1873 and organized in 1880."