The Dullahan, Durahan or Dullaghan (Irish: dúlachán, /ˈduːləˌhɑːn/), also called Gan Ceann (meaning "without a head" in Irish), is a type of mythological creature in Irish folklore. He is depicted as a headless rider, on a black horse, who carries his own head held high in his hand. It is said to be the embodiment of the Celtic god Crom Dubh.

The story of the Dullahan's house comes from Ireland. He is depicted as a Headless Horseman, on a black horse, who carries his own head held high in his hand.

The mouth is usually in a hideous grin that touches both sides of the head. Its eyes are constantly moving about and can see across the countryside even during the darkest nights. The flesh of the head is said to have the colour and consistency of mouldy cheese. The Dullahan is believed to use the spine of a human corpse for a whip, and its wagon is adorned with funeral objects: it has candles in skulls to light the way, the spokes of the wheels are made from thigh bones, and the wagon's covering is made from a worm-chewed pall or dried human skin. The ancient Irish believed that where the Dullahan stops riding, a person is due to die. The Dullahan calls out the person's name, drawing away the soul of his victim, at which point the person immediately drops dead.

There are rumours that golden objects can force the Dullahan to disappear.