ZIP code 03878 is officially located in the state of New hampshire, primarily serving the city of Somersworth. It falls under the administrative jurisdiction of Strafford County. When planning mail delivery, logistics routing, or demographic research, 03878 operates within the Eastern Time (ET) timezone and supports the 587 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 03878 ZIP Code Tabulation Area is approximately 43,987. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $66,878.