According to the Bible, Amon of Judah was the king of Judah and son of Manasseh of Judah. He began his reign at the age of 22. William F. Albright has dated his reign to 642 BC-640 BC, while E. R. Thiele offers the dates 643 BC-641 BC. He restored idolatry, and set up the images which his father had cast down. Zephaniah (1:4; 3:4, 11) describes his reign as marked by moral depravity.

He was assassinated (2 Kings 21:18-26: 2 Chronicles 33:20-25) by his own servants, who conspired against him.