ZIP code 01331 is officially located in the state of Massachusetts, primarily serving the city of New salem. It falls under the administrative jurisdiction of Worcester County. When planning mail delivery, logistics routing, or demographic research, 01331 operates within the Eastern Time (ET) timezone and supports the 730 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 01331 ZIP Code Tabulation Area is approximately 35,030. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $67,331.