The position of Under-Secretary of State for Dominion Affairs was a British ministerial position, subordinate to that of Secretary of State for Dominion Affairs, created in 1925 to deal with British relations with the Dominions – Canada, Australia, New Zealand, South Africa, Newfoundland, and the Irish Free State.

In 1947 the office was replaced by the Under-Secretary of State for Commonwealth Relations.

Under-Secretaries of State for Dominion Affairs, 1925-47[edit]

• 1925: Earl of Clarendon
• 1927: Lord Lovat
• 1929: Earl of Plymouth
• 1929: Arthur Ponsonby
• 1929: William Lunn
• 1931: Malcolm MacDonald
• 1935: Lord Stanley
• 1935: Douglas Hacking
• 1936: Marquess of Hartington
• 1940: Geoffrey Shakespeare
• 1942: Paul Emrys-Evans
• 1945: John Parker
• 1946: Arthur Bottomley

Permanent Under-Secretaries of State for Dominion Affairs, 1925-47[edit]

The post lasted as long as the office itself, from 1925 to 1947 with the last Permanent Under-Secretary of State for Dominion Affairs, Sir Eric Machtig, transferring in 1947 to become the Permanent Under-Secretary of State for Commonwealth Relations, jointly with A. Carter formerly of the India Office.

Name	Entered office	Left office
Sir Charles Davis	1925	1930
Sir Edward Harding	1930	1939
Sir Eric Machtig (acting)	1939	1940
Sir Cosmo Parkinson	1940	1940
Sir Eric Machtig	1940	1947

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 Undersecretaries		Foreign Office 1782–1968 Secretaries Ministers Undersecretaries							Foreign and Commonwealth Office 1968–2020 Foreign, Commonwealth and Development Office since 2020 Secretaries Ministers Undersecretaries
Southern Department 1660–1768 Secretaries Undersecretaries	Colonial Office 1768–1782 Secretaries Undersecretaries	Home Office 1782–1794 Secretaries Undersecretaries	War Office 1794–1801 Secretaries Undersecretaries	War and Colonial Office 1801–1854 Secretaries Undersecretaries	Colonial Office 1854–1925 Secretaries Undersecretaries	Colonial Office 1925–1966 Secretaries Ministers Undersecretaries		Commonwealth Office 1966–1968 Secretaries Ministers Undersecretaries
	Southern Department 1768–1782 Secretaries Undersecretaries					Dominions Office 1925–1947 Secretaries Undersecretaries	Commonwealth Relations Office 1947–1966 Secretaries Ministers Undersecretaries
.					India Office 1858–1937 Secretaries Undersecretaries	India Office and Burma Office 1937–1947 Secretaries Undersecretaries