Thorin, the king of the dwarves, dies in The Hobbit as a result of his injuries in The Battle of Five Armies.
Thorin was the king of the dwarves, and the leader of the company that included the dwarves and Biblo.
When the dwarves, Thorin, and Bibo are saved by the eagles, Thorin is gravely injured. Bilbo and Thorin have had their differences, especially regarding the Arkenstone, but Thorin forgives Biblo, honoring his bravery in the battle.
“… Since I leave now all gold and silver, and go where it is of little worth, I wish to part in friendship from you, and I would take back my words and deeds at the Gate." (ch 18)
Bilbo “he wept until his eyes were red and his voice was hoarse” at the loss of Thorin. Although he did not want to go on the adventure in the first place, he had come to respect the dwarf king.
as i think, Smaug and thorin die in the Hobbit