John Hay Whitney (27 August 1904 – 8 February 1982), colloquially known as "Jock" Whitney, was U.S. Ambassador to the United Kingdom, publisher of the New York Herald Tribune, and a member of the Whitney family.
Born on August 27, 1904, in Ellsworth, Maine, Whitney was a descendant of John Whitney, a Puritan who settled in Massachusetts in 1635, as well as of William Bradford, who came over on the Mayflower. His father was Payne Whitney, and his grandfathers were William C. Whitney and John Hay, both presidential cabinet members. His mother was Helen Hay Whitney.
The Payne Whitneys lived around the corner from James B. Duke, and his wife and daughter Doris. Whitney's uncle, Oliver Hazard Payne, a business partner of John D. Rockefeller, arranged the buyout of Duke's competitors to create the American Tobacco Co.