ZIP code 51010 is officially located in the state of Iowa, primarily serving the city of Castana. It falls under the administrative jurisdiction of Monona County. When planning mail delivery, logistics routing, or demographic research, 51010 operates within the Central Time (CT) timezone and supports the 392 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 51010 ZIP Code Tabulation Area is approximately 17,892. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $110,010.