Tyrfing may refer to:
- The recurring weapon.
- The enemy ability from Final Fantasy VI.
- The Notorious Monster from Final Fantasy XI.
- The ability from Final Fantasy Legends II.
- The enemy ability from Pictlogica Final Fantasy.
Tyrfing was a magic sword in Norse Mythology. In the Poetic Edda, Tyrfling was the sword of the Goth heroes, forged by Dwarves Dvalinn and Durin for the King Svafrlami who had trapped them. In the heroic tales it gleamed like fire, would never rust or miss, and could cut through iron as easily as cloth. However, the Dwarves also cursed it so that it would kill a man every time it was drawn and would also commit three evil deeds.