Lavinia Tananta is the defending champion of the Women's Singles competition of the 2011 Southeast Asian Games but lost to Anna Clarice Patrimonio in the quarterfinals. Ayu-Fani Damayanti won the title after beating top seed Noppawan Lertcheewakarn in the final by 6–4, 6–1.
All the four seeds received byes to the quarterfinals.