David Lee Emerson, PC, MP is a Canadian politician, who was previously a businessman and a civil servant. Emerson is interim Minister of Foreign Affairs and Minister of International Trade and Minister for the Pacific Gateway and the Vancouver-Whistler Olympics in the Canadian Cabinet. Like all other federal cabinet members, he is a member of the Queen's Privy Council for Canada and has the right to the style "The Honourable" for life.

Emerson has been the Member of Parliament for the riding of Vancouver Kingsway in British Columbia since 2004. He was first elected as a Liberal and served as Minister of Industry under Prime Minister Paul Martin. He was re-elected in the 2006 federal election as a Liberal. On February 6, 2006, Emerson accepted an offer to join the Conservative Government as Minister of International Trade and Minister for the Pacific Gateway and the Vancouver-Whistler Olympics. He thus became the first Canadian MP to take his seat in a newly-elected Parliament as a member of a party opposed to that under whose banner he won it.