Octagon House ist der Name folgender im NRHP gelisteten Objekte:
Octagon House (Danbury, Connecticut), ID-Nr. 73001945 Octagon House (Stamford, Connecticut), ID-Nr. 79002624 Octagon House (Georgia), ID-Nr. 69000049 Octagon House (Illinois), ID-Nr. 79000820 Octagon House (Hampden County, Massachusetts), ID-Nr. 82004967 Octagon House (Middlesex County, Massachusetts), ID-Nr. 84002762 Octagon House (Ohio), ID-Nr. 09000103 Octagon House (South Carolina), ID-Nr. 73001715 Octagon House (Washington, D.C.), ID-Nr. 66000863 Octagon House (Fond du Lac County, Wisconsin), ID-Nr. 72000051 Octagon House (Jefferson County, Wisconsin), ID-Nr. 71000039