Josiah’s Age When He Became King Josiah became king of Judah at a remarkably young age. According to biblical accounts in 2 Kings 22:1 and 2 Chronicles 34:1, Josiah was only eight years old when he ascended the throne after the death of his father, Amon. This made him one … Continue reading How old was Josiah when he became king, and how might his youth have affected his early reign?