Zaleucus (Ancient Greek: Ζάλευκος; fl. 7th century BC) was the Greek lawgiver of Epizephyrian Locris in Magna Graecia. According to the Suda, he was previously a slave and a shepherd, and after having been educated he gave laws to his fellow-citizens. Some sources make him a Pythagorean philosopher, although older ones put him as older than Pythagoras or even deny his existence altogether. They also attribute divine origin to his laws.