In 1920, the foundation had been laid, when minyan met for Sabbath and Holiday services at the home of the late Jacob Finestone.
In September, 1920, the name, Shaare Zion, was adopted and a slate of officers elected.
On March 24, 1926, Shaare Zion Congregation became a legally incorporated body, when it received its charter from the Province of Quebec.
Victoria Hall, in Westmount,was used as the improvised synagogue for Sabbath and Holiday services.
In 1939, the synagogue on Claremont Avenue was destroyed by fire, and the present site was purchased shortly thereafter.
In September 1947, the first High Holiday services took place, at Shaare Zion's present home on Cote St. Luc Road.