Humanitarians
- Barrett, Anthony (1964) – Founder of Pollution Probe and Chief Financial Officer of the World Wildlife Fund of Canada
- Barton, Eric CM (1957) – Founder of a leprosy treatment centre in India and principal of UCC
- Conacher, Duff (1982) – Founder of Democracy Watch and best-selling author
- Dalglish, Peter – Founder of Street Kids International and recipient of the Outstanding Young Persons of the World award
- Douglas, Ian CM KStJ CD QC – Founding president of the Canadian Epilepsy Association and chairman of the National Board of Governors of the Canadian Corps of Commissionaires
- Druckman, Miles (1982) – Founder of SOS International and named a "Global Leader of Tomorrow" by the World Economic Forum
- Woods, Ian (1968) – Social activist and publisher
Read more about this topic: List Of Upper Canada College Alumni