ZIP code 16921 is officially located in the state of Pennsylvania, primarily serving the city of Gaines. It falls under the administrative jurisdiction of Tioga County. When planning mail delivery, logistics routing, or demographic research, 16921 operates within the Eastern Time (ET) timezone and supports the 568 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 16921 ZIP Code Tabulation Area is approximately 28,568. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,921.