

Bischof von Livonien, Suffragan von Trakai und Koadjutor von Vilnius
Polish–Lithuanian Commonwealth
Joseph Kasimir Kossakowski (* 16. March 1738 in Šilai; † 9. May 1794 in Warsaw) was a bischof von Livonien, Suffragan von Trakai und Koadjutor von Vilnius. He was 56 years old. His faith was Catholic Church. His awards include Order of the White Eagle and Order of Saint Stanislaus. His cause of death was hanging to death.