The Thailand Open was a professional indoor hardcourt tennis tournament held in Bangkok, Thailand, from 2003 to 2013. Part of the ATP World Tour 250 series, it was held in the third week of September. The tournament was relocated by the Association of Tennis Professionals to Shenzhen as the ATP Shenzhen Open since 2013.

From 2005 to 2007, a WTA Tier III, the PTT Bangkok Open, was also held in the region before being discontinued.

Roger Federer is the only man to have won the singles competition more than once, in 2004 and 2005, while Andy Ram and Jonathan Erlich are the only doubles pair to have won the competition multiple times, in 2003 and 2006. In 2007, Sonchat Ratiwatana and Sanchai Ratiwatana became the first Thai champions of the event, winning in the final against Wimbledon doubles champion Michaël Llodra, and partner Nicolas Mahut. In November 2013, the ATP announced that the tournament would be relocated to Shenzhen, China, as the ATP Shenzhen Open.

Year	Champions	Runners-up	Score
2003	Taylor Dent	Juan Carlos Ferrero	6–3, 7–6
2004	Roger Federer	Andy Roddick	6–4, 6–0
2005	Roger Federer	Andy Murray	6–3, 7–5
2006	James Blake	Ivan Ljubičić	6–3, 6–1
2007	Dmitry Tursunov	Benjamin Becker	6–2, 6–1
2008	Jo-Wilfried Tsonga	Novak Djokovic	7–6, 6–4
2009	Gilles Simon	Viktor Troicki	7–5, 6–3
2010	Guillermo García-López	Jarkko Nieminen	6–4, 3–6, 6–4
2011	Andy Murray	Donald Young	6–2, 6–0
2012	Richard Gasquet	Gilles Simon	6–2, 6–1
2013	Milos Raonic	Tomáš Berdych	7–6, 6–3
2014	succeeded by Shenzhen Open

Year	Champions	Runners-up	Score
2003	Jonathan Erlich Andy Ram	Andrew Kratzmann Jarkko Nieminen	6–3, 7–6
2004	Justin Gimelstob Graydon Oliver	Yves Allegro Roger Federer	5–7, 6–4, 6–4
2005	Paul Hanley Leander Paes	Jonathan Erlich Andy Ram	6–7, 6–1, 6–2
2006	Jonathan Erlich Andy Ram	Andy Murray Jamie Murray	6–2, 2–6, [10–4]
2007	Sonchat Ratiwatana Sanchai Ratiwatana	Michaël Llodra Nicolas Mahut	3–6, 7–5, [10–7]
2008	Lukáš Dlouhý Leander Paes	Scott Lipsky David Martin	6–4, 7–6
2009	Eric Butorac Rajeev Ram	Guillermo García-López Mischa Zverev	7–6, 6–3
2010	Viktor Troicki Christopher Kas	Jonathan Erlich Jürgen Melzer	6–4, 6–4
2011	Oliver Marach Aisam-ul-Haq Qureshi	Michael Kohlmann Alexander Waske	7–6, 7–6
2012	Lu Yen-hsun Danai Udomchoke	Eric Butorac Paul Hanley	6–3, 6–4
2013	Jamie Murray John Peers	Tomasz Bednarek Johan Brunström	6-3, 3-6, [10-6]
2014	succeeded by Shenzhen Open

• Thailand Open (Pattaya) – women's tournament

13°54′47″N 100°32′53″E / 13.913°N 100.548°E / 13.913; 100.548