God

God, also known as The Creator, The Lord, or the Man Upstairs, created the entire universe, and the Natural Order. He always stays behind the scenes, not having made a single appearance.

He existed since the beginning of time. Very soon afterwards, he made the four archangels, then Heaven, and created beings like seraphs, angels and cupids to dwell in it.

Physical Appearance
It's the visage of God, and has only been seen by the Archangels and Death. It was said that Dean's Amulet can detect the presence of God, however Joshua thinks otherwise. Often when God does intervene, it's done behind the scenes, without physical interaction. Anna mentions that out of all the Host of Heaven, only four of them have seen God.

Early History
In the beginning, God existed with Death. He created Heaven, a place where he and his angels would eventually reside. He then created the first beasts, called Leviathans. But seeing the potential danger they could cause, he decided to lock them away in Purgatory. Then he created the archangels named Michael, Lucifer, Raphael and Gabriel, after who he created angels, seraphs, and cupids. The angels and archangels called God their father and existed only to glorify him.

Soon, God created humans. He asked all the angels to bow down to the humans as his greatest creations, and present more compassion towards the humans than to him. Lucifer soon became envious, as he was the favorite son of Heaven, and saw that humans were flawed and murderous (with both Death and Gabriel describing it as essentially being a "temper tantrum"). Faced with this situation, Lucifer became increasingly more and more prideful. He convinced one-third of all of Heavens Host to rebel with him. He went to Michael and asked him to stand with him, but Michael refused. A great and bloody battle ensued in Heaven where angels warred against angels. Michael and Lucifer fought in a cataclysmic battle until eventually, God caused the battle to cease by casting all the rebels, including Lucifer, out of Heaven. Out of anger against God, Lucifer corrupted a human soul later known as Lilith into the first demon. God had Michael cast him into Hell (to be specific, Lucifer's Cage). God continued to watch over and protect all his creation and children against anything that might hope to corrupt it, although it is inferred throughout the series that he is miserable, as he feels guilt for letting Lucifer be corrupted. Though when talking to Micheal in "Swan Song" Lucifer believes that since God made everything "He made me who I am. God wanted the Devil."

Season 4
Castiel says he rescued Dean under the commandment of God himself. Later, Uriel admits that he doesn't think God's around any more, and that Lucifer should run things. Dean asks Zachariah where God is, and is told that he has left. Uriel claims there is no God, although this could just be part of his belief in Lucifer instead. In season 5 when the Winchesters ask Joshua where God is, the angel claims He has been on Earth since he left Heaven.

Season 5
In "Sympathy for the Devil", Dean and Sam are trapped while Lucifer is about to emerge from his cage. Suddenly, everything becomes bright and the brothers find themselves on an air plane. They were put there by none other than God, himself. Later, when Dean questions Sam on how he's feeling, Sam notes that it's weird because he's not shaking and doesn't have a fever like he normally does after drinking demon blood. Sam gives the credit to whomever saved them and put them on the plane. In "The Dark Side of the Moon" it is confirmed by Joshua that God put them on the plane, put both brothers into Heaven, resurrectded Castiel, and cured Sam, which Joshua comments on being more than he has done in a long time. Joshua also states that God can get lonely and since Joshua can sympathize with him that is why he gets to talk to him.

At the end of Swan Song, the prophet Chuck Shurley is seen disappearing after fininshing the last book of the Supernatural series. Though it is never revisited in the show, the actor and Eric Kripke have both confirmed that Chuck was indeed God, and was acting from behind the scenes in order to preserve free will.

Season 6
In "The Third Man" Castiel states that God did not let Sam out of Hell, and since "Swan Song" no one has seen him (most likely even before as none of the angels knew where he was on Earth when he originally left Heaven.) Even Balthazar states "Dad, isn't coming back." and Raphael later references him when battling Castiel stating "Somehow I don't think God will be bringing you back this time."

In "The Man Who Would Be King", Castiel is desperate and morally ambiguous, and tells God the story of how he freed Sam from Lucifer's Cage, made a deal with Crowley and partnered up with him to find Purgatory, and started the Civil War in Heaven against Raphael. He prays to God to give him a sign, to which he receives no response.

In "The Man Who Knew Too Much," Castiel absorbs millions of souls to gain power, and snaps Raphael to pieces. He claims the souls as his own, and is adamant on not surrendering their power. When Sam arrives and stabs Castiel, the blade doesn't kill him, proving that he is not a regular angel anymore. He proclaims himself as the new God, and gives the Winchesters and Bobby an ultimatum: bow down to him or he will destroy them.

Powers & Abilities

 * Omnipotence: God is said to be the most powerful being in the universe. He is credited as the sole creator of all of creations. A few of his creations are Heaven, the Levianthans, Purgatory, Angels, Earth, and humans.
 * Omniscience: God is said to have unlimited knowledge and awareness and understanding of the universe, yet it's claimed He doesn't know whom is older, himself or Death, as stated by Death.
 * Omnipresence: God exists everywhere in the universe as he is one of the two fundamental forces in it, the other being Death, although Death can't be everywhere at once.
 * Immortality: God is older than time and also possibly even than Death, but neither remember who is older.﻿ In terms of immortality, he is invincible to all harm, as well as never aging. however, it is possible that he can die as Death said that he will reap him in the future.
 * Teleportation: God was able to put Sam and Dean on a plane, when they were outside Lucifer's Cage.
 * Resurrection: God has been able to resurrect Castiel twice.