Menninger is a surname. Notable people with the surname or its variant Meningerg include:
Johann Matthias Menninger (1733 - January 15, 1793), an Austrian actorKarl Augustus Menninger (July 22, 1893 - July 18, 1990), an American psychiatristKarl Menninger (October 6, 1898 – October 2, 1963), a German teacher of and writer about mathematicsWilliam Claire Menninger (1899-1966)Roy W. Menninger (born 1926), MDW. Walter Menninger (born October 23, 1931), MDWilliam Meninger, Trappist monk and authorThalia Menninger, the gold-digging dream girl in the CBS situation comedy series The Many Loves of Dobie Gillis (1959-1963)