Sir Henry Roy Forbes Harrod (13 February 1900 – 8 March 1978) was an English economist.

At Oxford Harrod was part of the Railway Club, which included: Henry Yorke, Roy Harrod, Henry Thynne, 6th Marquess of Bath, David Plunket Greene, Edward Henry Charles James Fox-Strangways, 7th Earl of Ilchester, Brian Howard, Michael Parsons, 6th Earl of Rosse, John Sutro, Hugh Lygon, Harold Acton, Bryan Guinness, 2nd Baron Moyne, Patrick Balfour, 3rd Baron Kinross, Mark Ogilvie-Grant, John Drury-Lowe.

[4] During the Second World War, he was briefly in Winston Churchill's "S-branch" – a statistical section within the Admiralty.

Interviewed for the book Authors take Sides on Vietnam, Harrod declared himself a supporter of the American military campaign in Indochina.

Harrod married Wilhelmine "Billa" Cresswell (1911–2005), step-daughter of General Sir Peter Strickland, in 1938.

With the post-war influence of so-called Keynesian economics and then challenges to it, cultural interest in the Bloomsbury Group, and the publication of thirty volumes of The Collected Writings of John Maynard Keynes in the 1970s and 1980s,[11] high interest in Keynes's life led to further biographies, most prominently by Robert Skidelsky and Donald Moggridge, and to detailed studies such as by Donald Markwell on Keynes and international relations.