The 2011 Mr. Olympia contest was an IFBB professional bodybuilding competition and the feature event of Joe Weider's Olympia Fitness & Performance Weekend 2011 held September 15–18, 2011 at the Las Vegas Convention Center and Orleans Arena in Las Vegas, Nevada. It was the 47th Mr. Olympia competition. Other events at the exhibition included the , Ms. Olympia, , and contests.