Alexander Karl Vasa, (4th November 1614 - 19th November 1634) (also known as Aleksander Karol Waza). Son of king of Polish-Lithuanian Commonwealth Zygmunt III Waza and austrian archduchess Constance of Austria, brother of Wladislav IV Waza, Johan Albert, Karl Ferdinand, Jan Kazimierz Waza, Anna Katharina Konstanze .

Supported his brother Wladislav IV Waza during the election of 1632.

After his voyage to Italy and Germany in 1634, supported the movement for the war with Ottoman Empire but died before he had any siginifact influence on the events. Died in Lwów or his residence in village Wielkie near Warsaw (sources vary) in 19 November 1634 from smallpox.