Koen Ridder (born 14 March 1985) is a Dutch badminton player. The left handler Ridder, was a part of the Duinwijck badminton club. He won the men's doubles title at the national championships in 2009, 2011, and 2013 partnered with Ruud Bosch. Together with Bosch, they won some international tournament in Portugal, Belgium, Canada, Slovenia, Norway, Peru and Tahiti. He also play for the Düren 57 club in German. His parents, Rob and Marjan Ridder also a professional badminton players. Koen Ridder was elected vice-chair of the athlete commission of the BWF for a 4-year term in May 2015. In 2017 Ridder was chosen as Chair by his fellow commission members. He achieved his personal best world ranking of 22 in 2013. Koen retired as a professional player in 2014 after representing The Netherlands for more than 10 years at international level. 
|Born||14 March 1985|
|Height||1.82 m (6 ft 0 in)|
|Highest ranking||22 (14 November 2013)|
BWF International Challenge/SeriesEdit
- "Players: Koen Ridder". Badminton World Federation. Retrieved 1 December 2017.
- "Koen Ridder". Wayback Machine. Archived from the original on 6 July 2011. Retrieved 1 December 2017. Cite uses deprecated parameter
- "Badzine: 'Bosch takes two... again'". Badminton Nederland. Retrieved 1 December 2017.
- "Koen Ridder" (in German). 1.Badminton-Club Düren 57 e.V. Retrieved 1 December 2017.
- "Marjan Ridder in eregalerij helden van Haarlem" (in Dutch). Rodi. Retrieved 1 December 2017.