Prince Gustav of Sweden, or Gustav Eriksson Vasa who was born January 28, 1568 and died in February 1607, was a Swedish prince and the son of king Eric XIV of Sweden and Karin Månsdotter.

Gustav was sent outside of Sweden in 1575, to protect him from King John who feared that the supporters of Eric would try to benefit his son with the crown. Gustav came to Poland where he lived in poverty and despair. At some time during his stay he became a Catholic. He married Brita Persson Karth. They had 4 children, Eric, Lars, Carl and Catharina.

Ivan IV of Russia attempted to persuade Gustav to help him in his political ambitions around the Baltic, but the attempts (which included both promises and several years imprisonment) failed. Gustav Eriksson Vasa died around February 22, 1607 in the small city of Kashin, Russia.

Prince Gustav is the main character of the famous polish novel "Broken star" by Jadwiga Żylińska.