Lavinia Tananta is the defending champion of the Women's Singles competition of the 2011 SEA 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.
Medalists Women's Singles Indonesia Ayu-Fani Damayanti Thailand Noppawan Lertcheewakarn Philippines Anna Clarice Patrimonio Thailand Nicha Lertpitaksinchai
Draw
Seeds
All the four seeds received byes to the quarterfinals.
Noppawan Lertcheewakarn (final) Ayu-Fani Damayanti (champion) Nicha Lertpitaksinchai (semifinals) Lavinia Tananta (quarterfinals)
Main draw
References Draw SEAG2011 Start/Result Lists - Tennis