The 2019 Ontario Men's Curling Championship, better known as the Tankard, the 2019 provincial men's curling championship for Southern Ontario, was held from January 27 to February 3 at the Woolwich Memorial Centre in Elmira, Ontario. The winning Scott McDonald team will represent Ontario at the 2019 Tim Hortons Brier in Brandon, Manitoba. The event is being held in conjunction with the 2019 Ontario Scotties Tournament of Hearts, the provincial women's curling championship. Unlike the 2018 event, the 2019 Tankard returned to having a round-robin format.