Jan Kazimierz Denhoff (1649–1697) was a Polish cardinal from 1686, Abbot of the Mogiła Abbey in 1666, canon of Warsaw, Dean of Płock, a canon of Kraków in 1681 and Bishop of Cesena in 1688. He is the author of several theological works.
- Occupation
- Catholic priest, diplomat, Catholic bishop
- Position held
- Camerlengo of the Sacred College of Cardinals, Commendatory abbot, Roman Catholic Bishop of Cesena, cardinal
- Citizenship
- Polish–Lithuanian Commonwealth
- Born
- July 8, 1649
- Died
