List of Famous people who are 31

Anıl Piyancı is a Turkish rapper, musician and songwriter.

Bradley Smith is a British motorcycle racer, contracted to Aprilia Racing Team Gresini as a development/test/replacement rider in the MotoGP class of the World Championship. He won the Suzuka 8 Hours in 2015, with Yamaha teammates Katsuyuki Nakasuga and Pol Espargaró.

Jung Hye-in is a South Korean actress. Jung is known for her support role in various television series such as Doctor Stranger (2014), Healer (2014–2015), Jugglers (2017), Graceful Family (2019), and most recently in Sisyphus: The Myth (2021).

Chiang Kai-hsin is a Taiwanese badminton player. In 2007, she reached the girls' doubles semifinal at the World Junior Championships in Waitakere City, New Zealand, winning the bronze medal. In 2009, she won bronze at the East Asian Games in the women's team event. In 2015, she represented National Taiwan Normal University at the World University Badminton Championships in Gwangju, South Korea and won the silver medal in the mixed doubles event. She was also the women's doubles semifinalist at the 2009 and 2014 Vietnam Open Grand Prix tournament.