The Hanover Historic District is a national historic district located in Hanover in York County, Pennsylvania. Bordered roughly by Elm Avenue, Broadway, Eisenhower Drive, Hollywood Avenue, and the borough's boundary line, this district encompasses 2,632 contributing buildings, four contributing sites, three contributing structures, and one contributing object in the central business district and surrounding residential area of Hanover.

John A. Dempwolf (1848–1926) was a German-born American architect practicing in York, Pennsylvania from 1876 until his death in 1926. In association with his brother Reinhardt Dempwolf and son Frederick G. Dempwolf, he was responsible for the design of some five hundred buildings in and around Pennsylvania.