Richard FitzWilliam, 4th Viscount FitzWilliam (1745–1816), was a British nobleman known for his role in the aristocracy during the late 18th and early 19th centuries. He inherited the title of Viscount FitzWilliam in 1816, following the death of his father, William FitzWilliam, 3rd Viscount FitzWilliam. FitzWilliam was also a prominent landowner and served as a Member of Parliament for Malton from 1774 to 1780. He was known for his contributions to the arts and his support of various cultural initiatives, reflecting the interests of the British elite during his time.