ZIP code 57642 is officially located in the state of South dakota, primarily serving the city of Mc laughlin. It falls under the administrative jurisdiction of Corson County. When planning mail delivery, logistics routing, or demographic research, 57642 operates within the Central Time (CT) timezone and supports the 520 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 57642 ZIP Code Tabulation Area is approximately 22,920. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $54,642.