2015 Australian Open – Women's Singles

Li Na was the reigning champion, but chose not to defend her title as she retired from professional tennis on 19 September 2014.

Serena Williams won the title, defeating Maria Sharapova in the final, 6–3, 7–6^(7–5), to earn her sixth Australian Open title and her 19th Grand Slam singles title overall, tying the record with Helen Wills Moody.

All of the top four seeds (Williams, Sharapova, Simona Halep, and Petra Kvitová) were in contention for the world no. 1 ranking at the start of the tournament. Williams retained the top position by reaching the final.

This was the last Grand Slam tournament for former World No. 2 player Vera Zvonareva.