Duncan Mearns (1779–1852) was a Scottish minister who served as Moderator of the General Assembly of the Church of Scotland in 1821. He was professor of divinity at Aberdeen University from 1816.
- Occupation
- Christian minister, theologian
- Position held
- Moderator of the General Assembly of the Church of Scotland
- Citizenship
- Kingdom of Great Britain, United Kingdom of Great Britain and Ireland
- Born
- August 23, 1779
- Died
- March 2, 1852
