Sir Henry Drummond Hancock, GCB, KBE, CMG (17 September 1895 – 24 July 1965) was an English civil servant.
Born on 17 September 1895, he studied at Exeter College, Oxford, before serving in the First World War, including in the Intelligence Corps.
He entered the civil service in 1920 as an administrator in the Ministry of Labour; his time there coincided with the General Strike of 1926 and the rising unemployment of the later interwar years.
He was appointed deputy secretary at the Ministry of National Insurance in 1945, working on the implementation of the post-war Labour government's social service reforms.
He was then chair of the Local Government Commission for England and held directorships in the private sector.