• Born date: 1860-03-07
  • Born in: Sydenham, Ontario
  • Death date: 1920-04-25
  • Death in: Edmonton (provincial electoral district)
Alexander Grant MacKay

Alexander Grant MacKay (March 7, 1860 – April 25, 1920) was a Canadian teacher, lawyer and provincial level politician. He served prominent posts in two provincial legislatures as Leader of the Opposition in Ontario and as a Cabinet Minister in Alberta.