The Under-Secretary of State for Commonwealth Relations was a junior ministerial post in the United Kingdom Government from 1947 until 1966. The holder was responsible for assisting the Secretary of State for Commonwealth Relations in dealing with British relationship with members of the Commonwealth of Nations (its former colonies). The position was created out of the old position of Under-Secretary of State for Dominion Affairs.

After 1966 the post was merged with the Under-Secretary of State for the Colonies and became the Under-Secretary of State for Commonwealth Affairs.

Officeholders

History of English and British government departments with responsibility for foreign affairs and those with responsibility for the colonies, dominions and the Commonwealth
Northern Department 1660–1782 Secretaries — UndersecretariesSouthern Department 1660–1768 Secretaries — Undersecretaries—
Southern Department 1768–1782 Secretaries — Undersecretaries 1782: diplomatic responsibilities transferred to new Foreign OfficeColonial Office 1768–1782 Secretaries — Undersecretaries
Foreign Office 1782–1968 Secretaries — Ministers — UndersecretariesHome Office 1782–1794 Secretaries — Undersecretaries
War Office 1794–1801 Secretaries — Undersecretaries
War and Colonial Office 1801–1854 Secretaries — Undersecretaries
Colonial Office 1854–1925 Secretaries — UndersecretariesIndia Office 1858–1937 Secretaries — Undersecretaries
Colonial Office 1925–1966 Secretaries — Ministers — UndersecretariesDominions Office 1925–1947 Secretaries — Undersecretaries
India Office and Burma Office 1937–1947 Secretaries — Undersecretaries
Commonwealth Relations Office 1947–1966 Secretaries — Ministers — Undersecretaries
Commonwealth Office 1966–1968 Secretaries — Ministers — Undersecretaries
Foreign and Commonwealth Office 1968–2020 Secretaries — Ministers — Undersecretaries
Foreign, Commonwealth and Development Office Since 2020 Secretaries — Ministers — Undersecretaries