Allais is a French surname. Notable people with the surname include:
Alphonse Allais (1854–1905), French writer and humorist David Allais (born 1933), American businessman and inventor Émile Allais (1912–2012), French alpine ski racer Jean-Jacques Allais (born 1969), French professional footballer Lucy Allais, philosopher Maurice Allais (1911–2010), French economist. Max Allais, musical artist Nicolas Viton de Saint-Allais (1773–1842), French genealogist and littérateur Pierre Allais (c. 1700–1782), French painter and pastel artist
See also Allais, Kentucky, unincorporated community and coal town in Perry County, Kentucky, United States Allai, disambiguation Allais effect, claimed anomalous precession of the plane of oscillation of a pendulum during a solar eclipse Allais paradox, choice problem designed by Maurice Allais