List of Famous people who are 31

Thammanoon Niyomtrong, best known as Knockout CP Freshmart, is a Thai professional boxer and former Muay Thai fighter who has held the WBA (Super) minimumweight title since 2016.

Megumi Toda is a Japanese voice actress from Tokyo. She is affiliated with Kenyu Office. She was regular on the Animate Pia Channel, which was broadcast on Nico Nico. Her major roles include Hajime Shinoda in New Game!, Kiitan in Etotama and Yuzu Iizuka in Sakura Trick. As part of the Etotama cast, she sang on the theme song under the group Soruaru BOB on a single called "blue moment" that reached number 49 on the Oricon charts. She also sang the theme songs for New Game! under the group forfolium; the singles "Sakura" and "Now Loading!!" reached numbers 33 and 42 on Oricon. As part of the Idolmaster cast, she sang on one of the singles which reached number 22.

Nieve Berónica Vibieca Aquino is a Dominican Republic female badminton player.

Akihiko Nakamura is a Japanese decathlete. He competed in the 400 m hurdles at the 2012 Summer Olympics, but was disqualified in the heats. At the 2016 Rio Games he placed 22nd in the decathlon. Nakamura won several medals on continental level in heptathlon and decathlon.