Ammann is a surname. Notable people with the surname include:
Erwin Ammann, German politician and co-founder of the Christian Social Union of Bavaria (1916 – 2000)
Jakob Ammann, Swiss anabaptist leader and founder of the Amish (c. 1644 – c. 1730)
Jean-Christophe Ammann, Swiss art historian and curator (1939 – 2015)
Johann Conrad Ammann, Swiss physician and fossil collector (1724 – 1811)
Johann Konrad Ammann, Swiss physician and instructor of deaf persons (1669 – 1724)
Mike Ammann, American soccer player (born 1971)
Othmar Ammann, structural engineer who built many of New York City's bridges (1879 – 1965)
Robert Ammann, American amateur mathematician with contributions to aperiodic tilings (1946 – 1994)
Simon Ammann, Swiss ski jumper (born 1981)
Thomas Ammann, Swiss art dealer and collector (1950 – 1993)
Johann Schneider-Ammann, Swiss politician (born 1952)
