This is a list of mines in the Canadian province of Ontario and includes both operating and closed mines.

• Adams Mine
• Agnew Lake Mine
• Amalgamated Larder Mine
• Argonaut Mine
• Armistice Mine
• Associated Goldfields Mine
• Barber Larder Mine
• Barton Mine
• Beanland Mine
• Bell Creek Mine
• Bidgood Mine
• Bicroft Mine (uranium)
• Big Dan Mine
• Black Fox Mine
• Buckles Mine
• Campbell Mine
• Can-Met Mine
• Cheminis Mine
• Chesterville gold mine
• Coleman Mine
• Copper Cliff North Mine
• Copper Cliff South Mine
• Copperfields Mine
• Coppersand Mine
• Cote Gold Mine
• Craig Mine
• Creighton Mine
• Denison Mine
• Detour Gold Mine
• Dome Mine
• Dyno Mine (uranium)
• Eagle River Mine
• Falconbridge Mine
• Faraday Mine (now Madawaska Mine)
• Frood Mine
• Fraser Mine
• Garson Mine
• Geco Mine
• Goderich Salt Mines – Sifto Canada
• Golden Giant Mine
• Greyhawk Mine (Uranium)
• Hagersville-CGC
• Hemlo Mine
• Hermiston-McCauley Mine
• Hollinger Mines
• Holloway Mine
• Holt Mine
• Hoyle Pond Mine
• Hudson Rand Mine
• Josephine Mine
• Kanichee Mine
• Keeley-Frontier Mine
• Kerr-Addison Mine (gold)
• Kidd Mine
• Kirkland Gold Mine
• Lac Des Iles Mine
• Lacnor Mine
• Laguerre Mine
• Lake Shore Mine
• Leckie Mine
• Lockerby Mine
• Macassa Mine
• Madawaska Mine (uranium)
• Magpie Mine
• Marmoraton Mine
• Martin Bird Mine
• Martinson mine
• McIntyre Mines
• McWatters Mine
• Milliken Mine
• Montcalm Mine
• Morris Kirkland Mine
• Murray Mine
• Musselwhite mine
• Nickel Rim Mine
• Nickel Rim South Mine
• Nordic Mine
• Norrie Mine
• Northland Pyrite Mine
• O'Connor Mine
• Omega Mine
• Pamour Mine
• Panel Mine
• Pawnee Mine
• Paymaster Mine
• Probe Mines
• Pronto Mine
• Queenston Mine
• Quirke Mine
• Rainy River Mine
• Red Lake Mine
• Redstone Mine
• Sherman Mine
• Sifto Salt Mine
• Spanish American Mine
• Stanleigh Mine
• Stanrock Mine
• Strathcona Mine
• Sylvanite Mine
• Talon Chutes
• Teck-Hughes Mine
• Temagami-Lorrain Mine
• Thayer-Lindsay Mine
• Timmins West Mine
• Titan mine
• Tough-Oakes (Toburn) Mine
• Upper Beaver Mine
• Upper Canada Mine
• Victor Diamond Mine
• Windsor Salt Mine – Canadian Salt Company
• Wilroy Mine
• Wright-Hargreaves Mine
• Young-Davidson mine