ZIP code 55421 is officially located in the state of Minnesota, primarily serving the city of Columbia heights. It falls under the administrative jurisdiction of Anoka County. When planning mail delivery, logistics routing, or demographic research, 55421 operates within the Central Time (CT) timezone and supports the 660 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 55421 ZIP Code Tabulation Area is approximately 24,460. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,421.