Stanisław Kazimierz Kossakowski (born 3 July 1837, died 4 November 1905) was a Polish heraldist, photographer, and landowner.

He was born at the family estate of Vaitkuškis as the son of count Stanisław Szczęsny Kossakowski, a senator, Privy Councilor of the Imperial Court, and President of the Heraldic Office of the Kingdom of Poland, and of Countess Aleksandra Laval.

In 1872–74 and again in 1876, he served as Vice President of the Society for the Encouragement of Fine Arts in Warsaw, and he was also a member of the supervisory board of the Music Institute.

In 1859, 1860, and 1872, he published three volumes of Historical-Genealogical Monographs of Certain Polish Families, in which he critically examined earlier heraldic works and compared them with historical documents.

The Vaitkuškis palace featured an extensive library with 12,500 volumes, as well as numerous archaeological, numismatic, and paleontological collections, along with an armory.

[4] The jewel of the collection was the uniform of Emperor Napoleon I, gifted to Józef Antoni Kossakowski [pl], a general in the Grand Army.