Józef Kazimierz Lubański (1914 – 8 December 1946) was a Polish theoretical physicist. Lubanski obtained the degree of magister philosophies at Wilna in 1937. He then worked for two years as an assistant in theoretical physics at Polish universities, and obtained a grant in order to travel to Holland and to work under Prof. H. A. Kramers at Leyden. His original intention was to go to Copenhagen in the following year, although the Second World War prevented this. He developed the Pauli–Lubanski pseudovector in relativistic quantum mechanics.