Major General Sir John Thomas Jones, 1st Baronet (25 March 1783 – 26 February 1843) was a British officer in the Royal Engineers who played a leading engineering role in a number of European campaigns of the early nineteenth century. Jones was revered by the Duke of Wellington and asked to advise on fortifications including the modernisation of the defences in Gibraltar. He was also notable as an English amateur cricketer who made six first-class appearances.