Georgina Mary Moore (8 April 1930 – 6 October 2017) (née Galbraith), was a British author, diplomat and administrator, the principal of St Hilda's College, Oxford, from 1980 to 1990. She published several novels, radio and television plays under the pen name Helena Osborne.
Georgina Mary Galbraith was the daughter of the historian Vivian Hunter Galbraith and the mediaeval historian Georgina Rosalie Cole-Baker.
Moore was an honorary fellow of Lady Margaret Hall, Oxford.
She was married to the diplomat A. R. Moore, from 1963 until his death in 2000.