Sir George Reresby Sitwell, 4th Baronet was a British antequarian writer and Conservative politician who sat in the House of Commons between 1885 to 1895.
Sitwell was born in London, the son of Sir Sitwell Reresby Sitwell, 3rd Baronet and his wife Louisa Lucy Hutchinson, daughter of the Hon. Henry Hely Hutchinson. His father died in 1862 and he succeeded to the baronetcy at the age of two. He was educated at Eton and Christ Church, Oxford. He was a lieutenant in the West Yorkshire Yeoman Cavalry.