Jones Ralfy Jansen
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| Born | 12 November 1992 Jakarta, Indonesia | |||||||||||||||||||||||||||||||||||||||||
| Height | 1.75 m (5 ft 9 in) | |||||||||||||||||||||||||||||||||||||||||
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| Country | Indonesia (2010–2011) Germany (2012–present) | |||||||||||||||||||||||||||||||||||||||||
| Sport | Badminton | |||||||||||||||||||||||||||||||||||||||||
| Handedness | Right | |||||||||||||||||||||||||||||||||||||||||
| Men's & mixed doubles | ||||||||||||||||||||||||||||||||||||||||||
| Highest ranking | 22 (MD with Josche Zurwonne, 28 June 2018) 24 (XD with Linda Efler, 20 December 2022) | |||||||||||||||||||||||||||||||||||||||||
| Current ranking | 75 (MD with Bjarne Geiss, 10 March 2026) | |||||||||||||||||||||||||||||||||||||||||
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Medal record
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Jones Ralfy Jansen (born 28 April 1992) is an Indonesian-born German badminton player who currently represents Germany. He was a former PB Djarum players and has joined that club in 2007. In 2010, he awarded as the best Djarum player. He won his first senior international title at the 2013 Portugal International tournament in the mixed doubles event partnered with Keshya Nurvita Hanadia. He also won the 2014 Finnish and Turkey International tournaments with his sister Cisita Joity Jansen.