Sir Ian Alexander McGregor (26 August 1922 – 1 February 2007) was a Scottish malariologist.

[2] He was educated at Rutherglen Academy, then studied medicine at St Mungo's College and Glasgow Royal Infirmary.

[2] He became interested in and studied malaria while undertaking National Service with the Royal Army Medical Corps in Palestine,[3] undergoing training in malariology at the Middle East School of Hygiene at Dimra.

[3] In 1980, he returned to the United Kingdom, as visiting professor at the Liverpool School of Tropical Medicine.

[3] He was awarded the Darling Foundation Medal in 1974,[1] elected a Fellow of the Royal Society in 1981[4] and a Fellow of the Royal Society of Edinburgh, and was made an Officer of the Order of the British Empire (OBE) in the 1959 New Year Honours;[5] a Commander of the Order of the British Empire (CBE) in the 1968 Birthday Honours;[6] and a Knight Bachelor in the 1982 Birthday Honours, "for services to Tropical Medicine".