ZIP code 51601 is officially located in the state of Iowa, primarily serving the city of Shenandoah. It falls under the administrative jurisdiction of Page County. When planning mail delivery, logistics routing, or demographic research, 51601 operates within the Central Time (CT) timezone and supports the 409 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51601 ZIP Code Tabulation Area is approximately 5,309. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $57,601.