ZIP code 53931 is officially located in the state of Wisconsin, primarily serving the city of Fair water. It falls under the administrative jurisdiction of Fond du Lac County. When planning mail delivery, logistics routing, or demographic research, 53931 operates within the Central Time (CT) timezone and supports the 257 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 53931 ZIP Code Tabulation Area is approximately 41,557. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $67,931.