The Octagon may refer to:

• The Octagon, Christchurch, a former church in the central city of Christchurch, New Zealand
• The Octagon, Dunedin, the city centre of Dunedin, New Zealand
• The Octagon (Egypt), the headquarters of the Egyptian Ministry of Defense in the New Administrative Capital of Egypt
• The Octagon House, Washington, D.C.
• The Octagon (Heidelberg University), Tiffin, Ohio
• The Octagon (Roosevelt Island), New York
• The Octagon at Amherst College, Massachusetts
• The Octagon (film), a 1980 Chuck Norris movie
• The Octagon (album), a 2020 album by Australian rapper Chillinit
• The Octagon, the trademarked name for the enclosure in Ultimate Fighting Championship#Octagon mixed-martial-arts bouts

• Octagon (disambiguation)
• Octagon Building (disambiguation)
• Octagon Theatre, Bolton, Greater Manchester, England
• Octagon Theatre, Perth, a theatre at the University of Western Australia

This disambiguation page lists articles associated with the title The Octagon.
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