ZIP code 56721 is officially located in the state of Minnesota, primarily serving the city of East grand forks. It falls under the administrative jurisdiction of Polk County. When planning mail delivery, logistics routing, or demographic research, 56721 operates within the Central Time (CT) timezone and supports the 768 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 56721 ZIP Code Tabulation Area is approximately 36,468. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,721.