Francis William Maine (15 September 1937 – 29 September 2018) was a Canadian chemical engineer, a scientist, entrepreneur, and politician who was a member of the Liberal Party of Canada. He was his party's representative in the House of Commons of Canada. Along with serving as a Member of Parliament, Maine served as Parliamentary Secretary to the Minister of State for Science and Technology. He died on Sept 29, 2018 in Guelph, leaving behind his wife of nearly 60 years, Mary-Eva Maine, 4 children, and 6 grandchildren.