ZIP code 57555 is officially located in the state of South dakota, primarily serving the city of Mission. It falls under the administrative jurisdiction of Todd County. When planning mail delivery, logistics routing, or demographic research, 57555 operates within the Central Time (CT) timezone and supports the 621 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 57555 ZIP Code Tabulation Area is approximately 30,021. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $75,555.