Curling Canada introduced a new 16-team format for both the Tournament of Hearts and
Brier for 2018, under which all 14 member associations of Curling Canada were represented in the main field, rather than being limited by a pre-qualifying tournament. The teams were divided into two pools for round robin play, after which the top four teams from each advanced to the Championship Pool. Defending champion
Rachel Homan declined to participate as Team Canada in order to prepare for the
2018 Winter Olympics;
Michelle Englot's team, who finished as runner-up in the 2017 tournament, participated in her place. The final spot in the tournament was filled by a
wildcard play-in game held on the Friday before the tournament. The rinks of
Hollie Duncan (
Ontario), Émilia Gagné (
Quebec), and
Casey Scheidegger (
Alberta) made their Scotties debut; although members of Team Ontario had previous experience at the national women's championship, mostly as alternates. Scotties veteran skip
Sherry Anderson (
Saskatchewan) led a team of Tournament of Hearts rookies. The teams are listed as follows:
CTRS ranking ==Wildcard game==