ZIP code 17566 is officially located in the state of Pennsylvania, primarily serving the city of Quarryville. It falls under the administrative jurisdiction of Lancaster County. When planning mail delivery, logistics routing, or demographic research, 17566 operates within the Eastern Time (ET) timezone and supports the 601 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 17566 ZIP Code Tabulation Area is approximately 4,801. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $62,566.