Angus John "Gus" Macdonald, Baron Macdonald of Tradeston, CBE, PC (born August 20, 1940), is a British Labour politician.

After careers in the shipbuilding industry and the media, he was elevated to the House of Lords on October 2, 1998. He served in Tony Blair's government as

• Minister for Business and Industry in the Scottish Office
• a Minister for Transport
• Chancellor of the Duchy of Lancaster.