Orsippus (Ancient Greek: Ὄρσιππος) was a Greek runner from Megara who was famed as the first to run the footrace naked at the Olympic Games and "first of all Greeks to be crowned victor naked."[1][2] Others argue that it was Acanthus instead who first introduced Greek athletic nudity. Orsippus won the stadion of the 15th Olympic Games in 720 BC.
Later, as a general, Orsippus conquered a neighboring territory for Megara,[2] which had recently become independent from Corinth. This accomplishment is commemorated by an epigram inscribed on the base of his statue erected by the Megarians in obedience to a Delphic response.[3]