The 2011 PTT Thailand Open was a tennis tournament played on indoor hard courts.

It was the ninth edition of the Thailand Open, and was part of the ATP World Tour 250 Series of the 2011 ATP World Tour.

It took place at the Impact Arena in Bangkok, Thailand, from September 26 through October 2, 2011.

The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: Andy Murray defeated Donald Young, 6–2, 6–0 Oliver Marach / Aisam-ul-Haq Qureshi defeated Michael Kohlmann / Alexander Waske, 7–6(7–4), 7–6(7–5)