Ross MacKenzie Whicher (February 13, 1918 – April 19, 2002) was a Canadian politician and businessman. Whicher served in World War II with the 4th anti-tank regiment of the Canadian military. Following the war, he returned home and opened the Wiarton Dairy, operating it for several decades. Whicher was re-elected to the legislature in 1959 and 1963 and served as the Liberals' finance critic. During this period, the Progressive Conservative government of John Robarts was often to the left of the Liberals, and Whicher often criticised it for overspending.