Kossakowski (Polish: plural: Kossakowscy, Polish: feminine: Kossakowska) (Lithuanian: Kosakovskiai, singular forms: m: Kosakovskis, f: Kosakovskienė, Kosakovskytė) was a noble family of the Polish–Lithuanian Commonwealth of the Masovian descent.
Coat of arms of the Kossakowski family was Ślepowron.
Kossakowski Palace in Warsaw
Kossakowski Palace in Warsaw (1922)