Trinity was a Canadian electoral district that existed from 1933 to 1987. It covered a portion of the western Toronto. Its name comes from the Trinity-Bellwoods area that was once home to Trinity College.

It was formed in 1933 from portions of Toronto Northwest , Toronto West Centre , and Toronto South . Its boundaries changed repeatedly over the years, when it created it stretched far north to the edge of the city boundaries. As this northern portion of became more populated it was split off into other ridings. Its eastern and western boundaries were fairly consistent, with it stretching from Bathurst Street in the east to Atlantic Avenue in the West. In 1987, due to the relative decrease in the population of downtown Toronto compared to other areas, it was merged with Spadina to form Trinity—Spadina. Some portions also went to the western riding of Davenport.

MPs representing Trinity

• Hugh Plaxton , Liberal (1935-1940)
• Arthur Roebuck, Liberal (1940-1945)
• Larry Skey , Progressive Conservative (1945-1949)
• Lionel Conacher, Liberal (1949-1954)
• Donald Carrick , Liberal (1954-1957)
• Stanley Haidasz, Liberal (1957-1958)
• Edward Lockyer , Progressive Conservative (1958)
• Paul Hellyer, Liberal/Independent/Progressive Conservative (1958-1974)
• Aideen Nicholson , Liberal (1974-1988)