Joseph-Philippe Guay, PC (October 4, 1915 – July 30, 2001) was a Canadian parliamentarian, serving as a member of the Liberal Party. Born in St. Vital, Manitoba, Guay was an alderman and mayor of Saint-Boniface, Manitoba before turning to federal politics. He won the St. Boniface Liberal nomination in the buildup to the 1968 federal election over the sitting member, cabinet minister Roger-Joseph Teillet. Guay campaigned on the fact that he, unlike Teillet, had supported Pierre Elliott Trudeau on every ballot of the 1968 Liberal Party of Canada leadership convention. He was returned in the general election, and was re-elected in 1972 and 1974.