ZIP code 07840 is officially located in the state of New jersey, primarily serving the city of Hackettstown. It falls under the administrative jurisdiction of Warren County. When planning mail delivery, logistics routing, or demographic research, 07840 operates within the Eastern Time (ET) timezone and supports the 327 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 07840 ZIP Code Tabulation Area is approximately 33,227. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $120,840.