Ahmann is a surname. Notable people with the surname include:
Crissy Ahmann-Leighton (born 1970), American swimmer, and Olympic champion Erhard Ahmann (1941–2005), German football manager Jörg Ahmann (born 1966), German beach volleyball player Mathew Ahmann (1931–2001), American Catholic layman and civil rights activist Philipp Ahmann (born 1974), German conductor, especially known as a choral conductor
See also Ahlmann Ahman