Aristagoras was a comic poet active in Athens during the 5th century BCE, the period of Old Comedy. No details of his life, birthplace, or personal history have survived beyond this basic identification. His name and profession are recorded solely in later ancient catalogs.

He is credited with two comedies, known only by their titles: Hymn to the Nymphs and Theseus. Both works are completely lost, with no surviving fragments of the text. The titles suggest he employed mythological themes, a common practice in the inventive and often satirical plays of his era.

Aristagoras represents the many minor poets whose works filled the vibrant Athenian theater scene but did not survive antiquity. His inclusion in historical records indicates he was remembered by later scholars as part of the literary tradition. While the complete loss of his texts means he holds no significant literary standing today, his recorded existence helps modern historians understand the scale and variety of classical Greek comedy.