Riverside South is a suburban community in Gloucester-South Nepean Ward in the south end of the city of Ottawa, Ontario, Canada, just southwest of Ottawa Macdonald–Cartier International Airport. Prior to amalgamation in 2001, the area was located in the city of Gloucester. Its population, according to the Canada 2021 Census, was 19,802. In the early 1990s this area was mostly vacant with a few houses and some farms. The first homes in the community were built in 1996.