Trillium Health Partners is a hospital system which serves Mississauga and western Toronto in the Canadian province of Ontario. It comprises the Credit Valley Hospital, Mississauga Hospital, and Queensway Health Centre. Trillium Health Partners is Canada's largest community-based, academically affiliated hospital, and has the largest emergency department in the country. Trillium Health Partners is affiliated with the University of Toronto and, in partnership with the University of Toronto Mississauga, jointly created the Mississauga Academy of Medicine.

Credit Valley Hospital is a regional hospital located in Mississauga, Ontario. Officially opened on November 5, 1985, it is now part of the Trillium Health Partners hospital group and primarily serves the communities of north Mississauga: Streetsville, Meadowvale, Erin Mills and the surrounding area. In 2012, it was ranked as the best hospital in the Greater Toronto Area in a study conducted by the Canadian Institute for Health Information.