ZIP code 03237 is officially located in the state of New hampshire, primarily serving the city of Gilmanton. It falls under the administrative jurisdiction of Belknap County. When planning mail delivery, logistics routing, or demographic research, 03237 operates within the Eastern Time (ET) timezone and supports the 503 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 03237 ZIP Code Tabulation Area is approximately 16,603. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $69,237.