Micaiah, son of Imlah, is a prophet in the Hebrew Bible. He is one of the four disciples of Elijah.
The events leading up to the appearance of Micaiah are illustrated in 1 Kings where Jehoshaphat, the king of Judah goes to visit the King Ahab of Israel and asks if he will go with him to take over Ramoth-gilead which was under the rule of the king of Aram.