Hammerl is a German surname. Notable people with the surname include:
Anton Hammerl (1969–2011) South African photojournalist Franz Hammerl (1919–2001), German footballer László Hammerl (born 1942), Hungarian sports shooter Paul Hammerl (born 1990), Austrian politician Walter Hammerl, Austrian band member
See also Josef Hamerl (born 1931), Austrian football player Hämmerli (surname)