ZIP code 51011 is officially located in the state of Iowa, primarily serving the city of Chatsworth. It falls under the administrative jurisdiction of Sioux County. When planning mail delivery, logistics routing, or demographic research, 51011 operates within the Central Time (CT) timezone and supports the 365 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51011 ZIP Code Tabulation Area is approximately 37,465. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $127,011.