Saint Catharines, city (1991 pop. 129,300), S Ont., Canada, on the Welland Ship Canal. An industrial center in a rich fruit-growing region, it has canneries and wineries as well as textile and paper mills; motor vehicle parts, machinery, electrical products, and farm implements are manufactured. St. Catharines was founded in 1790. Brock Univ. (1964) is in the city. The Royal Henley Regatta is held annually in Port Dalhousie, part of St. Catharines since 1961.