Richard FitzWilliam may refer to:
Richard FitzWilliam, 7th Viscount FitzWilliam (1745–1816), Irish Viscount, benefactor and musical antiquarian Richard FitzWilliam, 6th Viscount FitzWilliam (1711–1776), Irish peer and property developer Richard FitzWilliam, 5th Viscount FitzWilliam (c. 1677–1743), Irish nobleman and MP
See also Richard Fitzwilliams, PR consultant