Two Kingdoms

When the kingdoms of Judah in the south and Israel in the north were formed, the tribes of Judah and Benjamin formed the southern kingdom with its capital at Jerusalem and the other ten tribes formed the northern kingdom with its capital at Samaria. But looking at a map of the twelve tribes, I see that Simeon is the southern-most tribe. So I am a little confused. Why wouldn't the tribe of Simeon have been in the southern kingdom? Thank you for your help.

The Tribe of Shimon was not comprised of one contiguous piece of land; rather, they were spread out in the Land of Israel. There were two complete tribes that lived in the Kingdom of Judah and they were the Tribe of Judah and the Tribe of Benjamin.