Martha Hall Findlay (born August 17, 1959) is a Canadian businesswoman, entrepreneur, lawyer and politician who previously served as the president and CEO of the Canada West Foundation, a Calgary-based think tank, and is now senior vice-president and chief sustainability officer with Suncor Energy. Previously, she was elected to the House of Commons of Canada as the Liberal Party of Canada's candidate in the Toronto riding of Willowdale in a federal by-election held on March 17, 2008, to fill a vacancy created by former Liberal MP Jim Peterson's resignation. She was re-elected in the 2008 general election but lost her seat in the 2011 election.