Jan Čapek ze Sán was a Czech Hussite noble, general of Władysław III of Poland.
He was first mentioned in Hungarian sources as a leader of Władysław’s Hungarian-Polish army, which around 15 June 1440 occupied Győr, a territory belonged to Elizabeth of Luxemburg and her son, Ladislaus the Posthumous. He might be the leader of the army when Władysław crossed the borders of Hungary for the crowning ceremony, as he was the elected king of Hungary at this time.
He took part at the war against Ottomans in 1443, but he was not mentioned as a participant of the Battle of Varna, where the king died. He returned to Moravia, where he owned the castle of Hukvaldy. His last mentioning in the sources is from 1453.