Marcin Załuski (1700–1765) was an 18th-century Roman Catholic Bishop of Płock and statesman, in Poland.
- Occupation
- Catholic priest, Catholic deacon, Catholic bishop
- Position held
- titular bishop, auxiliary bishop, Grand Secretary of the Crown, Commendatory abbot
- Citizenship
- Polish–Lithuanian Commonwealth
- Born
- April 30, 1700
- Died
- July 11, 1768