George Dawson Preston FRSE (8 August 1896 – 22 June 1972) was a 20th century British physicist specialising in crystallography and the structure of alloys.
In the First World War he served in the Princess of Wales' Own Regiment and was wounded in the leg.
He studied natural sciences at Gonville and Caius College, Cambridge, graduating MA then gaining a postgraduate doctorate (DSc) in 1921.
He stayed there until 1943 when he replaced William Peddie as Professor of Physics at University College, Dundee.
His proposers were Edward Thomas Copson, Charles Alfred Coulson, Robert Campbell Garry and Alexander David Peacock.