ZIP code 01840 is officially located in the state of Massachusetts, primarily serving the city of Lawrence. It falls under the administrative jurisdiction of Essex County. When planning mail delivery, logistics routing, or demographic research, 01840 operates within the Eastern Time (ET) timezone and supports the 757 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 01840 ZIP Code Tabulation Area is approximately 21,057. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $120,840.