Most of the information on demons in the Bible is in the New Testament. The word only appears a few times in most translations of the Old Testament. Other terms, such as "familiar spirit", "lying spirit", "wizard" and others are occasionally used. The Eternal protected ancient Israel from demonic influences (Num 23:23) and told them to have nothing to do with them (Lev 19:31). Unfortunately, ancient Israel sought after evil spirits and by New Testament times, they had great influence. Christ cast out many demons and taught his followers to do the same.
Matt 4:24; 8:16; Mark 1:32-34, 39; Luke 13:32; 16:18 Christ cures demon possession among many other problems.
Matt 7:21-23 Some people will claim to cast out demons in Christ’s name but not really know Him.
Matt 8:28-34; Mark 5:1-19; Luke 8:26-39
Jesus casts out demons from two men into a heard of swine.
Matt 9:32-34 Jesus casts demon from mute/deaf man, Pharisees claim it is by the ruler of demons.
Matt 10:1,8; Mark 6:7,13; 13:14-15; Luke 9:1
Christ sends Apostles out, gives them authority to cast out demons.
Matt 11:18; Luke 7:33 John the Baptist accused of having a demon.
Matt 12:22-32; Mark 3:22-30; Luke 11:14-23
Christ casts demon out of a blind-mute man; Pharisees accuse Him of doing it by Beelzebub, prince of demons, and Christ explains that attributing miracles by the Holy Spirit to Satan will not be forgiven in the world to come.
Matt 15:22-28; Mark 7:25-30 Christ casts a demon out of Syro-Phoenician woman’s daughter.
Matt 17:14-21; Mark 9:14-30; Luke 9:38-43 Disciples could not cast out demon causing epilepsy in child, Christ said this kind required prayer and fasting to come out.
Matt 25:41 Everlasting fire is prepared for the Devil and his angels (demons).
Mark 1:23-28; Luke 4:33-37 Christ casts out demon in synagogue who tried to reveal His mission.
Mark 9:38-42; Luke 9:49-50 Christ tells disciples not to stop others from casting out demons in His name, even though they do not follow him.
Mark 16:8-10; Luke 8:1-3 Seven demons cast out of Mary Magdalene, yet she helped to fund his ministry and was the first to see Him when He was risen.
Mark 16:17 Casting out demons listed as first sign of those who believe.
Luke 4:41 Many demons were cast out while trying to reveal Christ’s mission.
Luke 10:17-20 Seventy disciples who were sent out rejoice that demons were subject to them.
Luke 11:24-26 Christ explains that when a demon is cast out, it may try to return with more demons.
Luke 13:10-13 Christ heals woman who had a "spirit of in firmity" for 18 years and could not stand up.
John 7:20; 8:48-49,52; 10:20-21 Christ is accused of "having a demon".
Acts 16:16-19 Paul and Silas cast a "spirit of divination" out of a woman.
Acts 19:13-20 Seven sons of Sceva are wounded when they fail to cast out a powerful demon in the name of "Jesus whom Paul preaches". The demon recognizes Jesus and Paul, but not these men. The well-known event causes many to burn their magic books.
1Cor 10:19-21; Rev 9:20 People who worship idols are worshipping demons.
2 Cor2:11 "lest Satan should take advantage of us; for we are not ignorant of his devices."
2Cor 11:13-14 "And no wonder! For Satan himself transforms himself into an angel of light. Therefore it is no great thing if his ministers also transform themselves into ministers of righteousness, whose end will be according to their works."
Eph 6:11-12 "Put on the whole armor of God, that you may be able to stand against the wiles of the devil. For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places."
1Tim 4:1-3 In the latter days, people will give into deceiving spirits and "doctrines of demons".
Jms 2:19 Demons believe there is one God.
Jms 3:13-16 Evil, earthly wisdom comes from demons.
2Pet 2:4 "For if God spared not the angels who had sinned, but having cast them down to the deepest pit of gloom has delivered them to chains of darkness to be kept for judgment;" (Darby Translation).
Jude 1:6-13 Angels that left their proper place wander around doing evil and will be judged for it.
Rev 12:3-4 The great red dragon (Satan) "drew a third of the stars of heaven and threw them to the earth". Did one third of the angels become demons?
Rev 16:13-14 Demons can perform false miracles.
Rev 18:2 Demons sometimes dwell in demolished cities.
—Norman Edwards