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. It is an associate member of the Toronto Academic Health Science Network (TAHSN), a consortium of hospitals affiliated with the University of Toronto.