ZIP code 54904 is officially located in the state of Wisconsin, primarily serving the city of Oshkosh. It falls under the administrative jurisdiction of Winnebago County. When planning mail delivery, logistics routing, or demographic research, 54904 operates within the Central Time (CT) timezone and supports the 838 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 54904 ZIP Code Tabulation Area is approximately 24,638. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $108,904.