Sir John D'Oyly (1702 – 1773) was the 4th and last D'Oyly baronet of Chislehampton.
John D'Oyly was the son of Sir John D'Oyly, 2nd Baronet of Chislehampton and Susanna Putt.
[1] He was educated at John Roysse's Free School in Abingdon, (now Abingdon School) and later Merton College, Oxford (fellow and Master of Arts).
[2] He was Rector of Cuxham, Oxfordshire.
[1][2] He succeeded his brother Sir Thomas D'Oyly, 3rd Baronet, to the title in 1759, was unmarried and the baronetcy became extinct upon his death in 1773.