Franz Tangl (Budapest, January 26, 1866 – Budapest, December 19, 1917) was a Hungarian physiologist and pathologist, member of the Hungarian Academy of Sciences.
He attended the University of Budapest and worked as an assistant in the Budapest pathological institute and the histological institute at Graz. He first became professor of histology and physiology at the Budapest veterinary high school, and in 1903 was appointed ordinarius of medical chemistry at the University of Budapest, in 1914 professor of physiology at the same university.
Along with pathologist Paul Clemens von Baumgarten, the eponymous Baumgarten-Tangl law is named.