Ottawa South (French: Ottawa-Sud) is a federal electoral district in Ottawa in the Canadian province of Ontario. It is represented in the Canadian House of Commons by David McGuinty, brother of former Ontario Premier and Ottawa South MPP Dalton McGuinty. The riding was created in 1987 from parts of Ottawa—Vanier, Ottawa Centre and the former Ottawa—Carleton electoral districts. It has been held continuously by Liberal candidates since it was first contested in 1988. Ottawa South is a suburban, generally middle class riding, notable for having the highest Arab population in Ontario.