Brian MacArthur (born 5 February 1940) is a British former newspaper editor.
MacArthur studied at Brentwood School, Helsby Grammar School and the University of Leeds. In 1962, he entered journalism, his first job being at the Yorkshire Post. After two years, he moved to Manchester to work on the Daily Mail, and he then worked at The Guardian for a year before joining The Times in 1967 where he was Education Correspondent and then founder editor of the Times Higher Education Supplement in 1971. He stood down in 1976 to become News Editor of The Times and was Deputy Editor of the Evening Standard from 1978 to 1979. His next post was Chief Assistant to the Editor of the Sunday Times, then after a year at The Times, he was appointed joint Deputy Editor of the Sunday Times. He left in 1984 to become Editor of the Western Morning News, but returned to London in 1986 to becoming the founding Editor-in-Chief of Today. One year later, he returned to the Sunday Times as Executive Editor, moving back to The Times in 1991. From 2006 to 2010, he was Assistant Editor of the Daily Telegraph.
MacArthur has also written and edited several books on historical and journalistic themes, including Eddy Shah: Today and the Newspaper Revolution, Deadline Sunday, Surviving the Sword and For King and Country and edited The Penguin Book of Modern Speeches.
In 1997 MacArthur was awarded an honorary MA by the Open University, and in 2011 he received an Honorary Doctorate of Arts from Plymouth University.