Lieutenant General Jonathon Peter Riley, CB, DSO (born 16 January 1955) is a retired British Army officer and military historian.

He was deployed as commanding officer of the 1st Battalion the Royal Welch Fusiliers to the Muslim enclave of Goražde in 1995 under a mandate to ensure the Serbs did not violate the NATO ultimatum.

The Army of Republika Srpska attacked the town without warning, capturing 33 soldiers under Riley's command and several hundred other fellow United Nations peacekeepers in May.

During the siege that followed, protocol was broken when, first, the Director of Military Operations, then the Chief of the General Staff, and, finally, Prime Minister John Major telephoned Riley to be briefed on the situation.

[23] On 14 December 2009, Riley gave evidence to The Iraq Inquiry, in which he stated that British troops had not expected to be faced with an insurgency and also defended the decision to disband the Iraqi Army after the invasion.

[24] Then, in February 2011, he gave evidence at the trial of Radovan Karadžić at the International Criminal Tribunal for the former Yugoslavia in The Hague on the incident in May 1995 when his troops had been held in captivity.