ZIP code 51538 is officially located in the state of Iowa, primarily serving the city of Harlan. It falls under the administrative jurisdiction of Shelby County. When planning mail delivery, logistics routing, or demographic research, 51538 operates within the Central Time (CT) timezone and supports the 327 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51538 ZIP Code Tabulation Area is approximately Data Not Available. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $86,538.