Crumpacker is a surname. Notable people with the surname include:
Edgar D. Crumpacker (1851–1920), U.S. Representative from Indiana John Webber Crumpacker (1908–1996), U.S. Naval officer Jonathan W. Crumpacker (1854–1904), justice of the New Mexico Territorial Supreme Court Maurice E. Crumpacker (1886–1927), Republican U.S. congressman from Oregon Shepard J. Crumpacker Jr. (1917–1986), U.S. Representative from Indiana
See also Maurice Crumpacker House, the former residence of Maurice E. Crumpacker