Rex Barnes (born June 4, 1959) is a Canadian politician.
Born in Grand Falls-Windsor, Newfoundland and Labrador, Barnes was a member of the Progressive Conservative caucus in the House of Commons of Canada, representing the riding of Gander—Grand Falls.
Barnes was the Progressive Conservative critic for Public Works and Government Services, and Transport.
In February 2011, he announced plans to challenge incumbent MHA Ray Hunter for the Progressive Conservative party nomination in Grand Falls-Windsor-Green Bay South for the 2011 provincial election.
[4] Barnes ran as an independent candidate in Grand Falls-Windsor-Buchans in the 2015 provincial election.