ZIP code 46721 is officially located in the state of Indiana, primarily serving the city of Butler. It falls under the administrative jurisdiction of De Kalb County. When planning mail delivery, logistics routing, or demographic research, 46721 operates within the Eastern Time (ET) timezone and supports the 570 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 46721 ZIP Code Tabulation Area is approximately 39,070. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,721.