The Octagon

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 mixed-martial-arts bouts