ZIP code 48104 is officially located in the state of Michigan, primarily serving the city of Ann arbor. It falls under the administrative jurisdiction of Washtenaw County. When planning mail delivery, logistics routing, or demographic research, 48104 operates within the Eastern Time (ET) timezone and supports the 220 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 48104 ZIP Code Tabulation Area is approximately 21,220. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $108,104.