Lieutenant-Colonel James Archibald St George Fitzwarenne-Despencer Robertson OBE (7 November 1886 – 5 May 1942), born James Archibald St George Robertson, was a Conservative Party politician in the United Kingdom. He educated at Eton College and New College, Oxford. On the outbreak of the First World War in 1914 he was commissioned on the General List. He transferred to the Royal Welch Fusiliers in 1916, ending the war as a Brevet Major and being appointed Officer of the Order of the British Empire (OBE) in 1919.