The 2011 Memorial Cup was a four-team round-robin format ice hockey tournament played from May 20–29, 2011 in Mississauga, Ontario. It was the 93rd annual Memorial Cup competition and determined the major junior ice hockey champion of the Canadian Hockey League (CHL). The Ontario Hockey League (OHL) announced on May 10, 2010 that the Mississauga St. Michael's Majors were chosen to host the event at the Hershey Centre. Other tournament participants included the Owen Sound Attack from the Ontario Hockey League (OHL), the Saint John Sea Dogs from the Quebec Major Junior Hockey League (QMJHL) and the Kootenay Ice from the Western Hockey League (WHL).

The Toronto St. Michael's Majors were a major junior ice hockey team in the Ontario Hockey League, based in Toronto, Ontario, Canada. The most recent franchise was revived on August 15, 1996. In 2007, the team relocated to Mississauga, Ontario and became the Mississauga St. Michael's Majors until 2012. The hockey program was founded and operated by St. Michael's College School in 1906, and adopted the name "Majors" in 1934, and was commonly referred to as St. Mike's Majors.