ZIP code 57251 is officially located in the state of South dakota, primarily serving the city of Marvin. It falls under the administrative jurisdiction of Grant County. When planning mail delivery, logistics routing, or demographic research, 57251 operates within the Central Time (CT) timezone and supports the 880 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 57251 ZIP Code Tabulation Area is approximately 37,280. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $107,251.