ZIP code 48611 is officially located in the state of Michigan, primarily serving the city of Auburn. It falls under the administrative jurisdiction of Bay County. When planning mail delivery, logistics routing, or demographic research, 48611 operates within the Eastern Time (ET) timezone and supports the 745 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 48611 ZIP Code Tabulation Area is approximately 5,645. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $127,611.