ZIP code 51242 is officially located in the state of Iowa, primarily serving the city of Lester. It falls under the administrative jurisdiction of Lyon County. When planning mail delivery, logistics routing, or demographic research, 51242 operates within the Central Time (CT) timezone and supports the 326 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51242 ZIP Code Tabulation Area is approximately 43,726. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $54,242.