Attica Downtown Historic District is a national historic district located at Attica, Fountain County, Indiana. The district encompasses 50 contributing buildings in the central business district of Attica. It developed between about 1840 and 1942, and includes notable examples of Art Deco, Gothic Revival, and Classical Revival style architecture. Notable buildings include the U.S. Post Office (1935) designed by the Office of the Supervising Architect under Louis A. Simon, McDonald House (1840), Revere Hotel (1853), and I.O.O.F Building (c. 1870).