South Tyneside is a metropolitan borough in the county of Tyne and Wear, England. It is bordered by all four other boroughs in Tyne and Wear: Gateshead to the west, Sunderland in the south, North Tyneside to the north and Newcastle upon Tyne to the north-west; the border county of Northumberland lies further north. The borough was formed on 1 April 1974 by the merger of the County Borough of South Shields with the municipal borough of Jarrow and the urban districts of Boldon and Hebburn from County Durham.
Part of the Tyneside conurbation, the sixth largest in the United Kingdom, South Tyneside has a geographical area of 24.88 sq mi (64.4 km) and an estimated population of 153,700 (mid-year 2010), measured at the 2011 Census as 148,127. It is bordered to the east by the North Sea and to the north by the River Tyne. A green belt of 9.13 sq mi (23.6 km) is at its southern boundary.