The 2011 PTT Pattaya Open was a women's professional tennis tournament played on outdoor hard courts. It was the 20th edition of the PTT Pattaya Open (formerly known as the Pattaya Women's Open) and was part of the International category on the 2011 WTA Tour. It took place at Dusit Thani Hotel in Pattaya, Thailand from February 6 through February 13, 2011.
Finals
Singles
Daniela Hantuchová defeated Sara Errani, 6–0, 6–2.
- It was Hantuchová's first title of the year, and fourth of her career.
Doubles
Sara Errani / Roberta Vinci defeated Sun Shengnan / Zheng Jie, 3–6, 6–3, [10–5].
WTA entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| Russia | Vera Zvonareva | 3 | 1 |
| Serbia | Ana Ivanovic | 19 | 2 |
| Russia | Maria Kirilenko | 25 | 3 |
| Slovakia | Daniela Hantuchová | 32 | 4 |
| Italy | Roberta Vinci | 38 | 5 |
| China | Peng Shuai | 40 | 6 |
| China | Zheng Jie | 43 | 7 |
| Italy | Sara Errani | 44 | 8 |
- 1 Rankings as of January 31, 2011.
Other entrants
The following players received wildcards into the main draw:
The following players received entry from the qualifying draw: