Callippus may refer to:
Callippus of Syracuse (died 352/51 BC), an Athenian student of Plato and tyrant of Syracuse Callippus (Calippus of Cyzicus, c. 370–300 BC), a Greek astronomer and mathematician Callippus of Athens (fl. 279 BC), an Athenian commander in the Battle of Thermopylae (279 BC) Calippus (crater), a small lunar crater Calippus (mammal), an extinct relative of the modern horse