Brian David Mason (born October 12, 1953) is a Canadian politician who was leader of the Alberta New Democratic Party from 2004 to 2014 and is currently the Minister of Infrastructure and Minister of Transportation in Rachel Notley's NDP government. Mason was first elected as a Member of the Legislative Assembly of Alberta for Edmonton-Highlands-Norwood in a 2000 byelection, and his career in politics spans more than twenty years.