The Secretary of State for Commonwealth Relations was a British Cabinet office existing between 1947 and 1966, responsible for dealing with British relationship with members of the Commonwealth of Nations (its former colonies). The position was created out of the old position of Secretary of State for Dominion Affairs. In 1966, the position was merged with that of the Secretary of State for the Colonies to form that of Secretary of State for Commonwealth Affairs, which was in turn merged with the Secretary of State for Foreign Affairs in 1968 to create the new position of Secretary of State for Foreign and Commonwealth Affairs.

Secretaries of State for Commonwealth Relations, 1947-1966

• Viscount Addison (July 7, 1947 - October 7, 1947)
• Philip Noel-Baker (October 7, 1947 - February 28, 1950)
• Patrick Gordon Walker (February 28, 1950 - October 26, 1951)
• Hastings Ismay, 1st Baron Ismay (October 28, 1951 - March 12, 1952)
• Robert Arthur James Gascoyne-Cecil, 5th Marquess of Salisbury (March 12, 1952 - November 24, 1952)
• Philip Cunliffe-Lister, 1st Viscount Swinton (November 24, 1952 - April 7, 1955)
• Alexander Douglas-Home, 14th Earl of Home (April 7, 1955 - July 27, 1960)
• Duncan Sandys (July 27, 1960 - October 16, 1964)
• Arthur Bottomley (October 18, 1964 - August 1, 1966)