Louis Jagellion (July 1, 1506, Prague, now in the Czech Republic – August 29, 1526, Mohacs, Hungary) was King of Bohemia and Hungary from 1516 to 1526. Louis was the son of Ladislaus V Jagiełłon and his third wife, Anne de Foix.
His father died in 1516 and the minor Louis II ascended to the throne of Hungary and Bohemia upon his father's death. Louis had been adopted by Holy Roman Emperor Maximilian I in 1515. When Maximilian I died in 1519, Louis was raised by his legal guardian Georg von Hohenzollern, margrave of Brandenburg-Ansbach.
In 1522 Louis II was married to Mary of Habsburg, a Habsburg princess, granddaughter of Maximilian I, as stipulated by an Imperial congress at Vienna in 1515. His sister Anne was married to Archduke Ferdinand of Austria, then a governor on behalf of his brother Charles V, and later Emperor Ferdinand I.
Louis died aginst the Turks at the Battle of Mohács in 1526. Ferdinand and Anne succeeded him in his Kingdom of Bohemia, but Hungary, largely conquered by the Turks, was further put into succession dispute between John Zápolya on one hand and Ferdinand and Anne on the other.
