Sir Ian Alexander McGregor, CBE FRS FRSE FRCP (26 August 1922 – 1 February 2007) was a Scottish malariologist. McGregor was born in Cambuslang, Lanarkshire, Scotland. His father was a tailor, his mother a housewife. He was educated at Rutherglen Academy, then studied medicine at St Mungo's College and Glasgow Royal Infirmary. He became interested in and studied malaria while undertaking National Service with the Royal Army Medical Corps in Palestine, undergoing training in malariology at the at Dimra. He served on several World Health Organization committees on malaria.