Korihor (/ˈkoʊ.rɪ.hɔːr/) is an anti-christ described in Alma 30 in the Book of Mormon.
Korihor is directly referred to in the Book of Mormon as an Anti-Christ, because he claimed there will be no Christ. Korihor was able to preach his views to the people because of the land's freedom of religion. These teachings alarmed the clerical government in Zarahemla, who felt that his views were dangerous to their society, as people had begun to ignore the laws of the land (which were based on the religious beliefs of their society). He attempted to preach to the people of Ammon, but the residents had kicked him out of Jershon. He also tried preaching in Gideon and he was arrested; before a high priest, during a hearing for his apparent blasphemy and for causing social discord, Korihor offered a speech in his own defense. Korihor was turned over to higher authority and later got into an argument with the chief judge and governor, Alma regarding the existence of God. Alma responded to Korihor's arguments, stating that all things testified that there is a God. Korihor finally demanded that Alma show him a sign from God or he, Korihor, would not believe in God. This culminated in Korihor being miraculously rendered deaf and mute, upon which Korihor confessed, in writing:
...I always knew that there was a God. But behold, the devil hath deceived me; for he appeared unto me in the form of an angel, and said unto me: Go and reclaim this people, for they have all gone astray after an unknown God. And he said unto me: There is no God; yea, and he taught me that which I should say.
Korihor begged for forgiveness, but Alma, sensing that Korihor would go back to his wicked ways, cast Korihor out. Korihor became a beggar and was later trampled to death by the Zoramites, a group who had separated themselves from the main Nephite society.