John George Stuart Donaldson, Baron Donaldson of Kingsbridge, OBE (9 October 1907 – 8 March 1998) was a British politician and public servant. He married Frances Lonsdale in 1935. He was a soldier, farmer, prison reformer, approved school manager,consumers' champion and was appointed by James Callaghan as Minister for the Arts from 1976 to 1979. Before his appointment as Arts Minister, Lord Donaldson served for several years as a Minister of State in the Northern Ireland Office at Stormont. He left the Labour Party for the Social Democratic Party (SDP) in 1981, and remained with the Liberal Democrats after the SDP merger with the Liberals.
Donaldson was commissioned into the Royal Engineers in 1939 and served throughout the Second World War, reaching the rank of lieutenant-colonel and being appointed Officer of the Order of the British Empire (OBE) in 1943.
He was created a life peer as Baron Donaldson of Kingsbridge, of Kingsbridge in the County of Buckinghamshire on 20 November 1967.