ZIP code 51240 is officially located in the state of Iowa, primarily serving the city of Inwood. It falls under the administrative jurisdiction of Lyon County. When planning mail delivery, logistics routing, or demographic research, 51240 operates within the Central Time (CT) timezone and supports the 713 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51240 ZIP Code Tabulation Area is approximately 3,513. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $120,240.