Niall MacDermot CBE OBE QC (10 September 1916 – 22 February 1996) was a British Labour politician.

MacDermot was educated at Rugby School and Corpus Christi College, Cambridge, and served in the Intelligence Corps during the Second World War.

He was Financial Secretary to the Treasury from 1964 to 1967, and retired from the Commons at the 1970 general election.

From 1970 to 1990, he was Secretary-General of the International Commission of Jurists, succeeding Seán MacBride.

This article about a Labour Party member of Parliament representing an English constituency is a stub.