|location= [[Hell]]
|occupation= [[Demon|Upper-class Demon]]
|episodes= [[4.07 It's The the Great Pumpkin, Sam Winchester]]
}}
Samhain, also known as the origin of Halloween, is a special type of demon.
When he reigned on Earth on Halloween night, people kept their children in that night, they wore masks to hide from him, carved pumpkins to worship him, and left sweets at their doors to appease him.<ref name="four07">[[4.07 It's The the Great Pumpkin, Sam Winchester]]</ref>
He can be summoned out of the confines of Hell by two [[witches]] through three human sacrifices over three days, the last of which must occur on the final day of Celtic harvest- the 31st of October- the American Halloween. This ritual can only be attempted every six-hundred years. Once Samhain rises, he is able to summon ghosts, zombies, and ghouls from the depths of the Pit and unleash these morbid entities on the world.
* Possibly needs a Vessel to walk the Earth (The last sacrifice victim?)
==[[4.07 It's The the Great Pumpkin, Sam Winchester]]==
Wanting to summon Samhain, two [[witch]]es named [[Tracy Davis]] and [[Don Harding]] (actually centuries-old siblings) start performing the sacrifices needed to summon Samhain. This draws the attention of the Winchesters and the [[Angel Lore|angels]] as the raising of Samhain is one of [[the 66 Seals]]. Sam and Dean kill Don, but Tracy reveals herself and succesfully summons Samhain, breaking the seal. Samhain posseses Don's body and recignizes Tracy before killing her. Samhain is unable to tell that Sam and Dean are alive due to a "mask" of blood they smeared on their faces so he leaves them alone.