Dahak may refer to:
- The enemy from Final Fantasy XI.
- The enemy family from Final Fantasy XIV.
- The boss from Final Fantasy Legend III.
Dahak is a variation on Dahaka. Aži Dahāka (also known as Zahhak) is an evil figure in Iranian folklore said to reside in an impregnable fortress and instigate terror by eating men. He is overthrown by the hero Fereyedun.