I have heard this question asked many times in my lifetime. While the answer is quite straightforward, “NO!”—a Christian cannot be demon possessed—there are other things that by demonic intervention can affect a Christian. Let's look a little deeper into this situation.
16. They can cause dumbness
and deafness (vs. 17, 25).
17. They cause rabid animal like behavior (vs. 18).
18. They can indwell from childhood (vs. 21).
19. They cause suicidal behavior (vs. 22).
20. They resist leaving a body and violently "rent" it while leaving
21. There are different kinds of devils. Some have more power than others
22. Some can only be removed by prayer and fasting of believer (vs.