Great Yarmouth, often called Yarmouth, is a seaside town which gives its name to the wider Borough of Great Yarmouth in Norfolk, England; it straddles the River Yare and is located 20 miles (32 km) east of Norwich. Its fishing industry, mainly for herring, shrank after the mid-20th century and has all but ended. North Sea oil from the 1960s supplied an oil-rig industry that services offshore natural gas rigs; more recently, offshore wind power and other renewable energy industries have ensued.

The Borough of Great Yarmouth is a local government district with borough status in Norfolk, England. It is named after its main town, Great Yarmouth, and also contains the town of Gorleston-on-Sea and a number of villages and rural areas, including part of The Broads. Other notable settlements include Caister-on-Sea, Hemsby, Hopton-on-Sea and Winterton-on-Sea.