ZIP code 03753 is officially located in the state of New hampshire, primarily serving the city of Grantham. It falls under the administrative jurisdiction of Sullivan County. When planning mail delivery, logistics routing, or demographic research, 03753 operates within the Eastern Time (ET) timezone and supports the 328 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 03753 ZIP Code Tabulation Area is approximately 26,228. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $41,753.