ZIP code 57216 is officially located in the state of South dakota, primarily serving the city of Big stone city. It falls under the administrative jurisdiction of Grant County. When planning mail delivery, logistics routing, or demographic research, 57216 operates within the Central Time (CT) timezone and supports the 590 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 57216 ZIP Code Tabulation Area is approximately 25,790. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $112,216.