Peter Alexander Rupert Carington, 6th Baron Carrington, (6 June 1919 – 9 July 2018) was a British Conservative politician and hereditary peer who served as Defence Secretary from 1970 to 1974, Foreign Secretary from 1979 to 1982, chairman of British General Electric Company from 1983 to 1984, and Secretary General of NATO from 1984 to 1988. Before his death in 2018, he was the last surviving member of the 1951–55 government of Winston Churchill, the Eden government, and the Macmillan government, as well as of the cabinets of Alec Douglas-Home and Edward Heath. Following the House of Lords Act 1999, which removed the automatic right of hereditary peers to sit in the House of Lords, Carrington was created a life peer as Baron Carington of Upton.
Carrington was Foreign Secretary in 1982 when Argentina invaded the Falkland Islands. He took full responsibility for the failure of the Foreign and Commonwealth Office to foresee this and resigned. As NATO Secretary General, he helped prevent a war between Greece and Turkey during the 1987 Aegean crisis.
He is also known as Peter Alexander Rupert Carington, 6th Baron Carrington and Lord Carrington.