ZIP code 51550 is officially located in the state of Iowa, primarily serving the city of Magnolia. It falls under the administrative jurisdiction of Harrison County. When planning mail delivery, logistics routing, or demographic research, 51550 operates within the Central Time (CT) timezone and supports the 294 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51550 ZIP Code Tabulation Area is approximately 19,194. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $90,550.