The first king of Israel was Saul.
Saul was chosen by God to be the first king of Israel, according to the Old Testament of the Bible. He was anointed as king by the prophet Samuel, who poured oil on his head as a sign of his selection by God.
Saul's reign as king was not always successful, and he made some mistakes that angered God. For example, he disobeyed God's commands and spared the life of a king he was supposed to destroy. As a result, God rejected him as king and chose David to be his successor.
Despite his flaws, Saul played an important role in the history of Israel as its first king. He led the Israelites in battles against their enemies and helped establish a monarchy that would continue for generations to come.