|King of Judah|
|Reign||Over Judah (796–792 BCE) Entire reign (796–767 BCE)|
|Predecessor||Joash of Judah|
|Died||c. 767 BCE|
|House||House of David|
|Father||Jehoash of Judah|
|Mother||Jehoaddan (Hebrew: יהועדין or יְהוֹעַדָּן; Latin: Joadan) of Jerusalem|
Amaziah of Judah, (pronounced //, Hebrew: אֲמַצְיָהוּ, ʼĂmaṣyāhû, meaning "the strength of the Lord," "strengthened by Yahweh," or "Yahweh is mighty"; (Greek: αμασιας; Latin: Amasias) was a king of Judah, the son and successor of Joash. His mother was Jehoaddan (2 Kings 14:1–4) and his son was Uzziah (2 Chronicles 26:1). He took the throne at the age of 25, after the assassination of his father, and reigned for 29 years, (2 Kings 14:2, 2 Chronicles 25:1) 24 years of which were with the co-regency of his son. The second Book of Kings and the second Book of Chronicles in the Hebrew Bible consider him a righteous king, but with some hesitation. He is praised for killing the assassins of his father only and sparing their children, as dictated by the law of Moses.
Edwin R. Thiele dates his reign from 797/796 to 768/767 BCE. Thiele's chronology has his son, Uzziah becoming co-regent with Amaziah in the fifth year of Amaziah's reign, in 792/791 BCE, when Uzziah was 16 years old.