Agariste (; Ancient Greek: Ἀγαρίστη) (fl. 6th century BC, around 560 BC) was the daughter, and possibly the heiress, of the tyrant of Sicyon, Cleisthenes. Her father wanted to marry her to the "best of the Hellenes" and, subsequently, he organized a competition, whose prize was the hand of his own daughter in marriage. According to his declaration, all the eligible young men had to appear in Sicyon within 60 days. Finally, twelve competitors appeared and Cleisthenes held a banquet in his guests' honour.