Henry George Lang ONZ CB (3 March 1919 – 17 April 1997) was a New Zealand public servant, economist, university professor and company director. He was born in Vienna, Austria on 3 March 1919 and later became the step-son of the architect Ernst Plischke. In the 1977 New Year Honours, Lang was appointed a Companion of the Order of the Bath, in recognition of his service as Secretary to the Treasury since 1969.