Jonathan Douglas Evans, Baron Evans of Weardale, KCB, DL (born 17 February 1958) is a British life peer who formerly served as the Director General of the British Security Service, the United Kingdom's domestic security and counter-intelligence service.

In 1999, with the violence in Northern Ireland greatly reduced due to the Good Friday Agreement, Evans moved to G-Branch,[7] the section of MI5 which deals with international terrorism.

He rose to head the section in 2001 (only a few days before the September 11, 2001 attacks), a position which put him on the service's board of management.

[14] Evans was appointed Knight Commander of the Order of the Bath (KCB) in the 2013 New Year Honours for services to defence, and was thereby granted the title Sir.

[18] He was created Baron Evans of Weardale, of Toys Hill in the County of Kent, on 3 December 2014,[19] and sits in the House of Lords as a crossbench peer.

[23] He is also a non-executive director of Ark Data Centres,[24][25] a Distinguished Fellow at the Royal United Services Institute[26] and an Honorary Professor at the University of St Andrews.

[31] On 16 December 2024, he was announced as the chair of the Crown Nominations Commission to select the next Archbishop of Canterbury, following the resignation of Justin Welby.