The demons that Jesus cast out of people are not in hell.
         Matthew 8:29 And, behold, they [the demons]  cried out, saying, What have we to do with thee, Jesus, thou Son of God? art thou come hither to torment us before the time? 
         Luke 8:31 And they [the demons] besought him [Jesus] that he would not command them to go out into the deep.