ZIP code 01301 is officially located in the state of Massachusetts, primarily serving the city of Leyden. It falls under the administrative jurisdiction of Franklin County. When planning mail delivery, logistics routing, or demographic research, 01301 operates within the Eastern Time (ET) timezone and supports the 367 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 01301 ZIP Code Tabulation Area is approximately 4,567. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $57,301.