ZIP code 48189 is officially located in the state of Michigan, primarily serving the city of Whitmore lake. It falls under the administrative jurisdiction of Washtenaw County. When planning mail delivery, logistics routing, or demographic research, 48189 operates within the Eastern Time (ET) timezone and supports the 494 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 48189 ZIP Code Tabulation Area is approximately 36,194. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $53,189.