ZIP code 66539 is officially located in the state of Kansas, primarily serving the city of Silver lake. It falls under the administrative jurisdiction of Shawnee County. When planning mail delivery, logistics routing, or demographic research, 66539 operates within the Central Time (CT) timezone and supports the 561 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 66539 ZIP Code Tabulation Area is approximately 14,561. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $103,539.