The Ottawa Hospital Research Institute (OHRI), formerly Ottawa Health Research Institute, is a non-profit academic health research institute located in the city of Ottawa. It was formed in 2001 following the merger of three Ottawa hospitals. The Ottawa Hospital Research Institute is the research arm of The Ottawa Hospital and affiliated with the University of Ottawa.
As of April 2013, the Ottawa Hospital Research Institute houses approximately 560 scientists and clinical investigators, 475 students and research fellows, and 700 support staff. It has five research programs: Cancer Therapeutics; Chronic Disease; Clinical Epidemiology; Regenerative Medicine; and Neurosciences.
Ronald G. Worton was the research institute's founding CEO and Scientific Director in 2001. In 2007, Duncan Stewart, formerly Chief Cardiologist of St. Michael's Hospital in Toronto and Director of Cardiology of University of Toronto, took over as CEO and Scientific Director.