Sir Owen St Clair O'Malley KCMG (4 May 1887 – 16 April 1974) was a British diplomat.
O'Malley helped British secret agents Andrzej Kowerski and Krystyna Skarbek escape Eastern Europe as German forces were advancing.
He is particularly noted for his incisive report sent on 24 May 1943 to the Foreign Secretary, Anthony Eden, on the Katyn Massacre indicating the likelihood of Soviet guilt and the moral issues raised.
[3] Besides his report on Katyn, O'Malley was also critical of Churchill's role in acceding to Stalin's demands regarding the frontiers of Polish territory after the war.
Sir Owen O'Malley died on 16 April 1974 at 27 Charlbury Road, Oxford, five weeks after the death of his wife.