ZIP code 16101 is officially located in the state of Pennsylvania, primarily serving the city of New castle. It falls under the administrative jurisdiction of Lawrence County. When planning mail delivery, logistics routing, or demographic research, 16101 operates within the Eastern Time (ET) timezone and supports the 599 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 16101 ZIP Code Tabulation Area is approximately 43,299. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $57,101.