ZIP code 03257 is officially located in the state of New hampshire, primarily serving the city of New london. It falls under the administrative jurisdiction of Merrimack County. When planning mail delivery, logistics routing, or demographic research, 03257 operates within the Eastern Time (ET) timezone and supports the 739 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 03257 ZIP Code Tabulation Area is approximately 30,139. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $109,257.