Witch hat, Witches hat, or Witches' hat may refer to:
Anti-trespass panels, rubber mats with cones or pyramids used by railroads to prevent people from walking on or near tracks A hat belonging to a witch (witch hat) A turret with a conical roof (see also, witch tower) A traffic cone A cone shaped playground roundabout that is mounted in such a way that the axis of rotation is free to tilt Hygrocybe conica, a small mushroom in the genus Hygrocybe "Witches Hat", a song on the Incredible String Band album The Hangman's Beautiful Daughter