Gorleston-on-Sea (/ˈɡɔːlstən/), known colloquially as Gorleston, is a town in the Borough of Great Yarmouth, in Norfolk, England, to the south of Great Yarmouth. Situated at the mouth of the River Yare it was a port town at the time of the Domesday Book. The port then became a centre of fishing for herring along with salt pans used for the production of salt to preserve the fish. In Edwardian times the fishing industry rapidly declined and the town's role changed to that of a seaside resort.