John Campbell (born 1947) is a British political writer and biographer. He is a graduate of the University of Edinburgh. His works include biographies of Lloyd George, Roy Jenkins, F.E. Smith, Aneurin Bevan, Edward Heath, and Margaret Thatcher, the last consisting of two volumes, The Grocers Daughter (2000) and The Iron Lady (2003). A one-volume abridgment prepared by David Freeman (a historian of Britain teaching at California State University, Fullerton) titled The Iron Lady: Margaret Thatcher, From Grocers Daughter to Prime Minister, was published in 2009 and reissued in paperback in 2011.
He was awarded the NCR Book Award for his biography of Heath. He is married with two children and lives in London.Campbell was consultant to the 2009 production of Margaret, a fictionalisation of Margaret Thatchers fall from power, and the 2012 film The Iron Lady.