Foucault may refer to:
Foucault (surname) Léon Foucault (1819–1868), French physicist. Three notable objects were named after him: Foucault (crater), a small lunar impact crater 5668 Foucault, an asteroid Foucault pendulum Michel Foucault (1926–1984), French philosopher Foucault (Deleuze book) (1986), a book about the French philosopher by Gilles Deleuze Foucault (Merquior book) (1985), a book about the French philosopher by J. G. Merquior
See also Foucault's Pendulum (1988), a novel by Umberto Eco Charles de Foucauld, explorer of Morocco, Catholic religious and priest