Newburyport is a coastal city in Essex County, Massachusetts, United States, 35 miles (56 km) northeast of Boston. The population was 18,289 at the 2020 census. A historic seaport with a vibrant tourism industry, Newburyport includes part of Plum Island. The mooring, winter storage, and maintenance of recreational boats, motor and sail, still contribute a large part of the city's income. A Coast Guard station oversees boating activity, especially in the sometimes dangerous tidal currents of the Merrimack River.

At the edge of the Newbury Marshes, delineating Newburyport to the south, an industrial park provides a wide range of jobs. Newburyport is on a major north–south highway, Interstate 95. The outer circumferential highway of Boston, Interstate 495, passes nearby in Amesbury. The Newburyport Turnpike (U.S. Route 1) still traverses Newburyport on its way north. The Newburyport/Rockport MBTA commuter rail from Boston's North Station terminates in Newburyport. The earlier Boston and Maine Railroad leading farther north was discontinued, but a portion of it has been converted into a recreation trail.