ZIP code 52638 is officially located in the state of Iowa, primarily serving the city of Middletown. It falls under the administrative jurisdiction of Des Moines County. When planning mail delivery, logistics routing, or demographic research, 52638 operates within the Central Time (CT) timezone and supports the 667 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 52638 ZIP Code Tabulation Area is approximately 19,567. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $86,638.