ZIP code 53040 is officially located in the state of Wisconsin, primarily serving the city of Kewaskum. It falls under the administrative jurisdiction of Washington County. When planning mail delivery, logistics routing, or demographic research, 53040 operates within the Central Time (CT) timezone and supports the 351 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 53040 ZIP Code Tabulation Area is approximately 35,351. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $120,040.