The winning John Epping team represented Ontario at the 2018 Tim Hortons Brier in Regina, Saskatchewan.

12 teams qualified from two regional qualifiers (three each), a challenge round (three teams), the winner of the Colts competition, plus the top two southern Ontario teams in the CTRS standings (as of December 10, 2017).

Teams entered:[9] (No event necessary, both teams qualify for provincial qualifiers) January 12-14 at the RCMP Curling Club, Ottawa Brackets:[10] January 12-14, Brant Curling Club, Brantford Brackets:[11] December 6-10 at the Midland Curling Club, Midland Qualified teams:[12] Qualifiers in bold.

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

November 18, Gananoque Curling Club, Gananoque[13] Teams entered: Teams entered:[14] November 18-19, Penetanguishene Curling Club, Penetanguishene Teams entered:[15] November 18-19, St. Marys Curling Club, St. Marys Teams entered: [16] January 19-21 at the Lindsay Curling Club, Lindsay Triple knockout results:[17] New teams: Brackets:[18]