Sir James Reginald Alfred Bottomley, KCMG (12 January 1920 - 5 June 2013) was a British diplomat.
He was born in London, the son of Sir (William) Cecil Bottomley, one time Senior Crown Agent, and Alice Bottomley, one time lecturer at the London School of Economics, daughter of Sir Richard Robinson.
Jim Bottomley was educated at King's College School and Trinity College, Cambridge; he was chairman of debates in the Cambridge Union Society in 1940, closing the debates to prevent proctoral censorship. In World War II he served in the Inns of Court Regiment, RAC, 1940–46 and was seriously wounded at Pont de Vère near Flers in Normandy in August 1944, requiring two years of surgery to repair his jaw.
He joined the Dominions Office in 1946, which became the Commonwealth Relations Office, and then the Foreign and Commonwealth Office, serving in London, Pretoria (1948–50), Karachi (1953–55), Washington DC for three years before the UN in New York(1955–59) and Kuala Lumpur (1963–67). In 1968 he undertook a supposedly secret mission to Salisbury, Rhodesia to restart talks with Ian Smith on Rhodesia's unilateral declaration of independence. Member, British Overseas Trade Board, 1972. He was British Ambassador to South Africa 1973-1976, and Permanent UK Representative to the UN and other international Organisations at Geneva 1976-78, at which point he retired from diplomatic service. He was a director of Johnson Matthey plc from 1979–85.