| Honorific Prefix: | Sir |
| John Jones | |
| Service: | MI5 |
| Serviceyears: | 1955–1985 |
| Rank: | Director General of MI5 |
| Awards: | KCB |
| Birth Date: | 17 February 1923 |
| Birth Place: | Easington, County Durham |
| Death Place: | Boston, Lincolnshire |
| Nationality: | British |
| Occupation: | Intelligence Officer, Civil servant |
| Alma Mater: | Christ's College, Cambridge |
Sir John Lewis Jones, KCB (17 February 1923 – 9 March 1998) was Director General of MI5, the United Kingdom's internal security service, from 1981 until 1985.
Jones was a native of Wigton in Cumbria, and went to The Nelson Thomlinson School in that town. A graduate of Christ's College, Cambridge, where he read History, he became an officer in the Royal Artillery during World War II and served as a civil servant in the pre-independence Government of Sudan.[1] He joined the Security Service in 1955.[2] He became Deputy Director General in 1976. He was Director General of MI5 from 1981 to 1985.[3]
He was appointed Knight Commander of the Order of the Bath (KCB) in the 1983 New Year Honours.