ZIP code 46321 is officially located in the state of Indiana, primarily serving the city of Munster. It falls under the administrative jurisdiction of Lake County. When planning mail delivery, logistics routing, or demographic research, 46321 operates within the Central Time (CT) timezone and supports the 498 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 46321 ZIP Code Tabulation Area is approximately 20,098. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,321.