John Duncan McNie (July 28, 1920 – September 2, 2006) was a politician in Ontario, Canada. He was a Progressive Conservative who served in the Legislative Assembly of Ontario from 1971 until 1975 representing the riding of Hamilton West. He served in the cabinet of Bill Davis from 1972 to 1975.

McNie was born in Scotland. He emigrated to Canada, settled in Hamilton, Ontario and married Mary Kathleen Skeans (1929–1980). Prior to being elected, McNie managed Kelley Advertising from the mid-1950s to 1971.

He was elected in the general election in 1971.^[1] In 1972 he was appointed to cabinet as Minister of Colleges and Universities.^[2] In 1974 he was demoted to the position of Minister without portfolio.^[3] McNie had asked Davis to reduce his workload due to health reasons.^[4] He did not stand for re election in the 1975 general election.^[5]

After leaving politics, he has served as a Co-Chair of the "Committee for Hamilton Place", as a Director at The Hamilton Council for a United Canada^{[citation needed]} and as a Director of a private company, Maplex Management & Holdings Limited.^{[citation needed]}

McNie died in Hamilton, Ontario.