Professor Duncan Macmillan HRSA is a Scottish art historian, art critic and writer.


Born in 1939, and educated at Gordonstoun School, he obtained his MA degree at the University of St Andrews, his Academic Diploma at the University of London, and his PhD at the University of Edinburgh. He is an honorary graduate of the University of Dundee. Macmillan is Professor Emeritus of the History of Scottish Art at the University of Edinburgh, and former Curator of the Talbot Rice Gallery. Between 2008 and 2012 he was the curator of the Royal Society of Edinburgh.


Macmillan has written extensively on Scottish art and artists and his books include Scottish Art 1460-2000. He is also art critic for The Scotsman


In 2023 Lund Humphries reissued Macmillan's key monograph about Dame Elizabeth Blackadder RSA.