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.
Seeds
All the four seeds received byes to the quarterfinals.
References
Tennis at the 2011 Southeast Asian Games – Women's Singles Wikipedia(Text) CC BY-SA