Jessica Pegula defeated Liudmila Samsonova in the final, 6–1, 6–0 to win the women's singles title at the 2023 Canadian Open.

Pegula, on the other hand, played one match each day of the tournament from Wednesday through Sunday.

[2] Simona Halep was the reigning champion,[3][4] but could not defend her title due to a provisional suspension for violations of anti-doping rules.

The event is not mandatory on the women's side and points from the 2022 tournament are included in the table below only if they counted towards the player's ranking as of 7 August 2023.

§ No change in points because the player's result from the 2022 tournament did not count towards her ranking as of 7 August 2023.