Stetter is a German surname. Notable people with the surname include:
Florian Stetter (born 1977), German actor Georg Stetter (1895–1988), Austrian-German nuclear physicist George Stetter (born 1945), American player of Canadian football Hans Stetter (1927–2019), German actor Hans Jörg Stetter (1930–2025), German mathematician Karl Stetter (born 1941), German scientist Mitch Stetter (born 1981), American baseball player (born 1972), German politic scientist Wilhelm Stetter (1487−1552), Alsatian painter
See also Dora Koch-Stetter (1881–1968), German artist Stetter reaction, a reaction in organic chemistry