User blog comment:Chaos11394/Where Do the Demons Go?/@comment-76.189.26.84-20120601230249

Well they have to go somwhere. Demons are tormented souls of humans...souls cannot be destroyed. They don't just cease to exist. Your choices are Heaven, Hell and Purgatory. Heaven is out. They're bad...probably amongst the most evil creatures in the Supernatural universe. Heaven is out for obvious reasons. Then there is Hell. I see two problems with this. The only way to send a demon back to hell is through exorcism. Demons usually freak out when they are about to be exorcised because they hate Hell and don't want to go back. They don't do this when they are about to die, in fact several times in Supernatural a demon has flat out dared someone to kill them. As if they just didn't care.

The second problem is see is that it's obviously possible for a demon to escape Hell. Either through a gate like in Season Two or by possessing a human, which is temporary, until they are killed/exorcised. It doesn't seem plausible that they would be able to repeateadly escape from Hell after being exorcised (Meg for one) but that they couldn't escape after being killed. After a demon is killed, we never see them again. So it's not likely that they go to Hell. The last option would then be Purgatory.

The problem with Purgatory is that it is stated that it is the resting place for the souls of monsters (and Leviathans). Monsters were created by Eve. Demons were not created by Eve, they were created by Lucifer. However, it could be that Demons are also considered "monsters" by God, just a different type. Either that or possibly someone just failed to mention that dead Demons/Fallen Angels go there also. It has never been explicity said, "They do NOT go there." As far as I know at least. Therefore Purgatory seems the most likely option of the three to me personally.

One other option is this...in Christianity, apparently Angels/Demons cannot die. Demons are not a separate race from Angels in the bible...Demons are simply Fallen Angels. In Supernatural, that is obviously different. While Supernatural does differ from the Bible in many ways, they do take a lot of inspiration from it. So perhaps they have taken the Biblical principal that Demons/Angels are immortal and cannot die. The only way to "get rid" of a Demon or a Fallen Angel is to IMPRISON them. Abaddon, the destroyer angel is imprisoned in a bottomless pit of sorts. So perhaps dead Demons and/or Fallen Angels in the Supernatural series go to another dimension entirely. One that has not been mentioned or expounded upon yet. A prison or holding cell for Fallen Angels or Demons, similar to Lucifer's cage. This place could even be IN Purgatory or even be a separate part of Hell. Of course this option would be pure speculation since such a place has not yet been mentioned. So I'm going to go with Purgatory until it's proven otherwise by the show's writers.