| Honorific-Prefix: | Sir |
| Roger Sewell Bacon | |
| Honorific-Suffix: | MBE |
| Birth Date: | 23 January 1895 |
| Death Place: | London, United Kingdom |
| Education: | Rugby School |
| Alma Mater: | Balliol College, Oxford |
| Occupation: | Judge |
| Office1: | Chief Justice of Gibraltar |
| Term Start1: | 1946 |
| Term End1: | 1955 |
| Office2: | Justice of Appeal, East African Court of Appeal |
| Term Start2: | 1955 |
| Term End2: | 1957 |
| Spouse: | Catherine Grace Connolly |
Sir Roger Sewell Bacon, MBE (23 January 1895 – 17 February 1962) was a British judge who was Chief Justice of Gibraltar (1946–55) and a Justice of Appeal on the East African Court of Appeal (1955–57).
Roger Sewell Bacon was born on 23 January 1895, the elder son of Sewell Bacon.[1] He was schooled at Rugby before going up to Balliol College, Oxford.[2]
Bacon had held a temporary commission in the Cheshire Regiment during the First World War. Called to the bar in 1923, he remained in law for the rest of his professional life. He was a Deputy Judge Advocate from 1940 to 1943 and a legal adviser to the War Office from then until 1946, when he became Chief Justice of Gibraltar. Having served in that post for nine years, he was appointed a Justice of Appeal on the East African Court of Appeal in 1955, serving until 1957.[2]
Bacon had been appointed a Member of the Order of the British Empire (MBE) in 1943, and was made a Knight Bachelor in 1958, the year after he retired from the East African Court of Appeal. He died aged 67 at London on 17 February 1962, leaving a widow, Catherine Grace, daughter of the Honourable James Connolly.[2]