Hermesianax (Ancient Greek: Ἑρμησιάναξ) was a Greek masculine name. Notable people with this name were:

• Hermesianax (poet), an elegiac poet from Colophon
• Hermesianax of Tralles, his three daughters were champions and he erected a monument at Delphi for them
• Hermesianax, a wrestler from Colophon
• Hermesianax, a historian from Cyprus