Gorleston-on-Sea, historically and colloquially known as Gorleston, is a seaside town in the borough of Great Yarmouth in Norfolk, England. It lies to the south of Great Yarmouth, on the opposite side of the mouth of the River Yare. Historically in Suffolk, it was a port town at the time of the Domesday Book. It was incorporated into Great Yarmouth in 1836. Gorleston's port became a centre of fishing for herring along with salt pans used for the production of salt to preserve the fish.