The Northern Kingdom, also known as the Northern Tribes or the Ten Tribes of Israel, were one of two nations that resulted when Israel was split due to the unwise leadership of King Rehoboam (2 Chronicles 10). The other nation was Judah (the Southern Kingdom).
The Northern Kingdom would eventually be conquered by the nation of Assyria, which deported the Israelites, forcibly dispersing them to many different areas.
There is no biblical mention of these people ever returning in any significant numbers, and as a result they are therefore sometimes called the Lost Tribes of Israel.
Key verse about Northern Kingdom: I am about to summon all the peoples of the northern kingdoms,” declares the Lord. “Their kings will come and set up their thrones in the entrance of the gates of Jerusalem; they will come against all her surrounding walls and against all the towns of Judah (Jeremiah 1:15, NIV)
A lifelong student of the Bible, Peter DeHaan, PhD, wrote the 700-page website ABibleADay.com to encourage people to explore the Bible. His main blog and many books urge Christians to push past the status quo and reconsider how they practice their faith in every area of their lives.