ZIP code 48439 is officially located in the state of Michigan, primarily serving the city of Grand blanc. It falls under the administrative jurisdiction of Genesee County. When planning mail delivery, logistics routing, or demographic research, 48439 operates within the Eastern Time (ET) timezone and supports the 728 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 48439 ZIP Code Tabulation Area is approximately 33,628. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $103,439.