Octagon Building can refer to:
Philippines Octagon (Ortigas Center), in Pasig, Metro Manila A building on the campus of Polytechnic University of the Philippines Santo Tomas
United Kingdom Octagon, Birmingham, a residential skyscraper under construction in Birmingham, England The main building at University College London
United States Octagon Building (Santa Cruz, California) Octagonal Building (Mexico), part of the Mexico exhibit at the 1884 World Cotton Centennial fair in New Orleans, Louisiana The Octagon at Amherst College, Massachusetts Andrew Gildersleeve Octagonal Building, Mattituck, New York The Octagon (Roosevelt Island), New York The Octagon (Heidelberg University), Tiffin, Ohio
Elsewhere The Octagon (Egypt), defense headquarters for the Egyptian Ministry of Defense, in the New Administrative Capital, Egypt The Octagon, Christchurch, a former church in Christchurch, New Zealand
See also Octagon barn (disambiguation) Octagon Centre Octagon Chapel (disambiguation) Octagonal churches in Norway Octagon Hall Octagon Hotel Octagon House (disambiguation) Octagonal Mausoleum Octagonal Schoolhouse (disambiguation) Octagon Theatre The Octagon (disambiguation) List of octagonal buildings and structures