ZIP code 03820 is officially located in the state of New hampshire, primarily serving the city of Madbury. It falls under the administrative jurisdiction of Strafford County. When planning mail delivery, logistics routing, or demographic research, 03820 operates within the Eastern Time (ET) timezone and supports the 299 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 03820 ZIP Code Tabulation Area is approximately 38,799. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $80,820.