Who haunted the room in the movie 1408?

Answer 1

Well, all the ghosts of the people who died in the room are stuck there (like the lady in the 50's-style skirt who keeps jumping out the window, and the sewing machine company guy who slit his own throat and then tried to stitch it back together).

But the main thing that haunts the room -- the evil presence -- is not a ghost. Ghosts used to be human, and the thing that haunts 1408 was never human. Rather, it's an evil force, just an evil presence. As Sam Jackson's character, Mr. Olin, says, "It's an evil ****ing room." Exactly what it is and where it came from is never revealed, because it's a lot scarier when things like this are left unexplained.