ZIP code 01040 is officially located in the state of Massachusetts, primarily serving the city of Holyoke. It falls under the administrative jurisdiction of Hampden County. When planning mail delivery, logistics routing, or demographic research, 01040 operates within the Eastern Time (ET) timezone and supports the 615 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 01040 ZIP Code Tabulation Area is approximately 34,915. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $120,040.