The Canadian men's eight crew, men's lightweight four and women's quad sculls all won their events while Rob Gibson of Kingston, Ont., won a silver in the men's single sculls.
The results pushed Canada's rowing total at the Games to 11 — eight gold, one silver and two bronze.
Canada's men's eight crew led from start to finish, winning with a time of six minutes 7.01 seconds.
Argentina won silver in 6:10.08 and the United States won bronze in 6:12.64.
Earlier, Kate Goodfellow of London, Ont., Kerry Shaffer of Welland, Ont., Carling Zeeman from Cambridge, Ont. and Antje Von Seydlitz from Smithers, B.C. were almost nine seconds ahead of the rest of the field, finishing in 7:07.63 in women's quad sculls.
The United States won silver in 7:16.26 and Argentina took bronze in 7:18.09.
Maxwell Lattimer of Delta, B.C., Brendan Hodge of South Delta, B.C., Nicolas Pratt of Kingston and Eric Woelfl of St. Catharines, Ont., won the lightweight four in 6:42.40, more than four seconds ahead of the U.S. Chile was third.
In the single sculls, Cuba's Angel Fournier finished more than six seconds ahead of the pack to win gold in 7:51.39.
Gibson was second with a time of 7:57.94.
Brian Rosso of Argentina won bronze.