Peter Muir Doig (27 October 1911 – 31 October 1996) was a British Labour Party politician. Doig was educated at Blackness School, Dundee, before taking evening classes. He later became a sales supervisor. He joined the Labour Party in 1930. During the Second World War he served in the Royal Air Force. He was elected a Dundee town councillor for ten years, serving as honorary town treasurer. In 1966 Doig was recorded as a member of the Transport and General Workers Union and the Co-operative Society. He was married with two sons.