Jotham or Yotam (Hebrew: יוֹתָם‎, Modern: Yōtam, Tiberian: Yōṯām; Greek: Ιωαθαμ, romanized: Ioatham; Latin: Joatham) was the eleventh king of Judah, and son of King Uzziah and Jerusha (or Jerushah), daughter of Zadok. Jotham was 25 years old when he began his reign, and he reigned for 16 years. Edwin R. Thiele concluded that his reign commenced as a coregency with his father, which lasted for 11 years. Because his father Uzziah was afflicted with tzaraath after he went into the Temple to burn incense, Jotham became governor of the palace and the land at that time, i.e. coregent, while his father lived in a separate house as a leper.

William F. Albright dated his reign to 742–735 BCE. Thiele dated his coregency with Uzziah starting in 751/750 BCE and his sole reign from 740/39 to 736/735 BCE, at which time he was deposed by the pro-Assyrian faction in favor of his son Ahaz. Thiele places his death in 732/731 BCE.

The Gospel of Matthew lists Jotham of Judah in the genealogy of Jesus. The archeologist Nelson Glueck found an imprint of king Jotham near Eilat. Also near Eilat there is a wadi called "Yatam wadi".