Defending champion Serena Williams defeated Simona Halep in the final, 6–3, 7–6(7–5) to win the women's singles tennis title at the 2015 Cincinnati Masters.
Seeds The top eight seeds received a bye into the second round.
Serena Williams (champion) Maria Sharapova (withdrew because of a right leg injury) Simona Halep (final) Petra Kvitová (second round) Caroline Wozniacki (second round) Ana Ivanovic (quarterfinals) Lucie Šafářová (quarterfinals) Karolína Plíšková (third round) Garbiñe Muguruza (first round) Carla Suárez Navarro (first round) Angelique Kerber (first round) Timea Bacsinszky (first round) Agnieszka Radwańska (first round) Elina Svitolina (semifinals) Andrea Petkovic (third round) Sara Errani (first round)
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
Qualifying
Seeds
Qualifiers
Lucky loser Mirjana Lučić-Baroni
Draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
Seventh qualifier
Eighth qualifier
Ninth qualifier
Tenth qualifier
Eleventh qualifier
Twelfth qualifier
References
Main Draw Qualifying Draw