Klapper is a surname. Notable people with the surname include:
Bonnie S. Klapper (born 1957), an American lawyer David Klapper, co-founder of Finish Line, Inc. Gilbert Klapper, a paleontologist Ilse von Klapper, wife of William S. Burroughs from 1937 to 1946 John Klapper, British scholar Leora Klapper, an economist Melissa Klapper, American historian Paul Klapper (1885–1952), a Romanian-American educator Radu Klapper (1937–2006), an Israeli-Romanian poet and author
See also Klapper Hall, an early building at City College of New York
See also Klapp