2009 BWF World Championships

The 2009 BWF World Championships was the 17th tournament of the World Badminton Championships, a global tournament in the sport of badminton. It was held at the Gachibowli Indoor Stadium in Hyderabad, Andhra Pradesh, India, from 10–16 August 2009. It was the first ever World Championships event to take place in India.

Badminton England withdrew before the first round due to a perceived threat of terror against the team. They were later joined by two Austrian doubles players. Lin Dan won the men's singles event, thus becoming the only player in badminton history to have won three men's singles world championship titles having done so consecutively in 2006, 2007, and 2009. Lu Lan won the World Championship title in the women's singles event. Cai Yun and Fu Haifeng of China won the World Championship title in the men's doubles event in a match which was later dubbed a "classic". Zhang Yawen and Zhao Tingting won the World Championship title in the women's doubles event, whilst Thomas Laybourn and Kamilla Rytter Juhl of Denmark won the World Championship title in the mixed doubles event.