Sir Roger William Jackling GCMG (10 May 1913 in Hythe, Kent, England – 23 November 1986 in London) was a British diplomat who was ambassador to West Germany 1968–72.
He was posted as Commercial Secretary at Quito, Ecuador, in 1942 but returned to the US in 1943, this time to the embassy at Washington, D.C. where he remained until 1947 when he was transferred to the Foreign Office in London.
In 1951 he was transferred to The Hague as commercial counsellor, then in 1953 to West Germany as economic and financial adviser to the UK High Commissioner at Bonn.
In May 1955 the Federal Republic of Germany was declared "fully sovereign", the High Commissioner Sir Frederick Hoyer Millar became the Ambassador, and Jackling was promoted to Economic Minister.
Jackling was posted as Counsellor at the British Embassy in Washington 1957–59, then to the Foreign Office as Assistant Under-Secretary 1959–63, then as deputy permanent UK representative to the United Nations 1963–67, with the personal rank of Ambassador from 1965 when he acted as President of the Security Council.