Hermonax the Epic Poet was active in the 4th century BCE. No biographical details concerning his origin or life are recorded. The name is distinct from the 5th-century Attic vase painter of the same name.

No specific epic work is securely attributed to him. The Suda mentions a Hermonax who composed parodies, not epic poetry. A fragment of the Persica is sometimes ascribed to a Hermonax, though other sources assign it to a different author and its genre is ambiguous.

Hermonax remains an obscure figure. His classification as an epic poet suggests participation in the post-Homeric compositional tradition, but his historical influence and importance cannot be assessed from extant sources.