Robert Fitzroy Foster (born January 16, 1949) - generally known as Roy Foster - is the Carroll Professor of Irish History at Hertford College, Oxford in the UK.
As well as early biographies of Charles Stewart Parnell and Lord Randolph Churchill, Foster is the editor of “The Oxford History of Ireland” (1989) and author of “Modern Ireland: 1600-1972” (1988) as well as several books of essays.
More recently, Foster has produced a much acclaimed two part biography of William Butler Yeats, and also collaborated with Fintan Cullen on a National Portrait Gallery exhibition, ‘Conquering England: the Irish in Victorian London’. Based in London as well as at Hertford College in Oxford, Foster visits Ireland frequently as well as spending the summer there.
He has been married to the novelist and critic Aisling Foster since 1972 and they have two children. His work is generally published under the name R. F. Foster.