Saul (; Hebrew: שָׁאוּל‎, Šāʾūl; Greek: Σαούλ, Saoúl; transl. "asked/prayed for") was, according to the Hebrew Bible, the first monarch of the United Kingdom of Israel. His reign, traditionally placed in the late 11th century BCE, supposedly marked the transition of Israel and Judah from a scattered tribal society ruled by various judges to organized statehood.

The historicity of Saul and the United Kingdom of Israel is not universally accepted, as what is known of both comes exclusively from the Hebrew Bible. According to the text, he was anointed as king of the Israelites by Samuel, and reigned from Gibeah. Saul is said to have died by suicide when he "fell on his sword" during a battle with the Philistines at Mount Gilboa, in which three of his sons were also killed. The succession to his throne was contested between Ish-bosheth, his only surviving son, and David, his son-in-law; David ultimately prevailed and assumed kingship over Israel and Judah.