Sir Mountstuart Elphinstone Grant Duff, known as M. E. Grant Duff before 1887 and as Sir Mountstuart Grant Duff thereafter, was a Scottish politician, administrator and author. He served as the under-secretary of state for India from 1868 to 1874, under-secretary of state for the colonies from 1880 to 1881 and the governor of Madras from 1881 to 1886.
- Occupation
- politician, lawyer, writer, barrister
- Position held
- Privy Council of the United Kingdom, Member of the Privy Council of the United Kingdom, member of the 22nd Parliament of the United Kingdom, member of the 21st Parliament of the United Kingdom
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born