Date of Birth: 
Place of Birth: Melaka, Malaysia
About Ong Jian Guo
- Ong Jian Guo (born 29 January 1989 in Malacca) is a badminton player from Malaysia.
- Ong was selected to join the Malacca team in 2001, and two years later he moved to Kuala Lumpur to educated at the Bukit Jalil Sports School.
- He was the bronze medalist at the 2007 World Junior Championships in the boys' doubles event, and helped the Malaysia men's team won the silver medal at the 2011 Southeast Asian Games in Jakarta, Indonesia.
- Ong had a relationships with the Olympic silver medalist Goh Liu Ying since they were 19 years old, but in 2017, they ended their relationship.
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