Sir James Johnstone, 4th Baronet

Sir James Johnstone, 4th Baronet (23 January 1726 – 3 September 1794) ) was a Scottish officer in the British Army and then a politician. He sat in the House of Commons of Great Britain for all but one of the years 1784 to 1794.

Family Sir James was the son of Sir James Johnstone, 3rd Baronet and his wife Barbara, daughter of Alexander Murray, 4th Lord Elibank. In about 1759 he married Louisa Maria Elizabeth Colclough, the widow of Rev. John Meyrick, vicar of Edwinstowe, East Retford, Nottinghamshire. They had no children.