Menninger is a surname. Notable people with the surname or its variant Meningerg include:
Johann Matthias Menninger (1733–1793), Austrian actor Karl Augustus Menninger (1893–1990), American psychiatrist Karl Menninger (1898–1963), German teacher of and writer about mathematics William Claire Menninger (1899–1966) Roy W. Menninger (1926–2024), MD W. Walter Menninger (born 1931), MD William Meninger (1932–2021), Trappist monk and author Thalia Menninger, the gold-digging dream girl in the CBS situation comedy series The Many Loves of Dobie Gillis (1959-1963)
See also the Menninger Foundation, a foundation in Topeka, Kansas, established 1941