Charles XV or Carl was King of Sweden and Norway, there often referred to as Charles IV, from 8 July 1859 until his death in 1872. Charles was the third Swedish monarch from the House of Bernadotte. He was the first one to be born in Sweden, and the first to be raised from birth in the Lutheran faith.

The House of Bernadotte is the royal family of Sweden, founded there in 1818 by King Charles XIV John of Sweden. It was also the royal family of Norway between 1818 and 1905. Its founder was born in Pau in southern France as Jean Bernadotte. Bernadotte, who had been made a General of Division and Minister of War for his service in the French Army during the French Revolution, and Marshal of the French Empire and Prince of Ponte Corvo under Napoleon, was adopted by the elderly King Charles XIII of Sweden, who had no other heir and whose Holstein-Gottorp branch of the House of Oldenburg thus was soon to be extinct on the Swedish throne. The current king of Sweden, Carl XVI Gustaf, is a direct descendant of Charles XIV John.