The winning team represented Ontario at the 2018 Scotties Tournament of Hearts in Penticton, British Columbia.

Had they not qualified for the Olympics, they still would not have had a chance to defend their title, as they would have represented Team Canada at the 2018 Scotties Tournament of Hearts.

November 24–27 at the Lindsay Curling Club, Lindsay[4] Teams entered: Brackets:[5] November 25-26, 2017 at the St. Thomas Curling Club, St. Thomas[6] Teams entered: Brackets:[7] December 6-10 at the Midland Curling Club, Midland Qualified teams:[8] Qualifiers in bold.

Two teams qualify from each event for the provincial Trophy Championship.

November 17-19, Gananoque Curling Club, Gananoque Teams entered: November 17-19, Port Perry Community Curling Club, Port Perry Teams entered:[9] November 18, Penetanguishene Curling Club, Penetanguishene Teams entered:[10] November 17-19, St. Marys Curling Club, St. Marys Teams entered: [11] December 15, 2017 at the Leaside Curling Club, East York, Toronto[12] New teams: