Józef Zawadzki (July 14, 1886 in Warsaw – February 22, 1951 in , near Warsaw) was a Polish physical chemist and technologist. Father of Tadeusz (Zośka) and Anna Zawadzka. Zawadzki was a co-founder, President and Vice-President of the Polskie Towarzystwo Chemiczne. He was a professor (from 1923) and rector (1936–1939) of Warsaw University of Technology, and a member of the Polish Academy of Learning (since 1947). The oldest and largest traditional lecture hall at the Warsaw University of Technology is named Prof. Józef Zawadzki Auditorium.