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.

[3] He was appointed Knight Commander of the Order of the Bath (KCB) in the 1983 New Year Honours.

This article about a person involved in governance in the United Kingdom or its predecessor states is a stub.