ZIP code 51556 is officially located in the state of Iowa, primarily serving the city of Modale. It falls under the administrative jurisdiction of Harrison County. When planning mail delivery, logistics routing, or demographic research, 51556 operates within the Central Time (CT) timezone and supports the 250 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51556 ZIP Code Tabulation Area is approximately 40,150. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $92,556.