According to Official Guinness Records,
The youngest Olympic table tennis medallist is Mima Ito (Japan, b. 21 October 2000) who at 15 years and 300 days won a bronze medal at the 2016 Olympic Games, in Rio de Janeiro, Brazil, on 16 August 2016.Mima won bronze in the women's team table tennis event with fellow teammates Ai Fukuhara and Kasumi Ishikawa.
For a complete list of 2016 records, please visit 2016 Guinness Records in Brazil.