Derek Alan Angus QSM (21 February 1938 – 2 May 2024) was a New Zealand politician of the National Party.
Angus was born in Lumsden on 21 February 1938, and educated at Waitaki Boys' High School.
He was a member of the Guardians of Lakes Te Anau and Manapouri, and served on the Southland Conservation Board.
He served as a member of the Otago-Southland divisional executive from 1974 to 1981 and was a National Party dominion councillor from 1977 to 1981.
During his time in parliament, Angus variously served on the states revision, lands and agriculture, and electoral law reform select committees, and was National Party spokesperson for forestry and lands.