List of Famous people who are 21

Uta Abe is a Japanese judoka.

William Abadie is an actor best known for his roles in recent television series such as Gossip Girl (2007–2009), Chuck (2008), Homeland (2013), Person of Interest (2014), Gotham (2016) and Emily in Paris (2020).

Kaito Kozono is a professional Japanese baseball player. He plays infielder for the Hiroshima Toyo Carp.

Rusty-Jake Rodriguez is a professional Austrian darts player who plays in Professional Darts Corporation events. In 2017, he was the inaugural winner of the JDC World Championship.

Priyam Garg is an Indian cricketer. He made his List A debut for Uttar Pradesh in the 2018–19 Vijay Hazare Trophy on 19 September 2018. He made his first-class debut for Uttar Pradesh in the 2018–19 Ranji Trophy on 1 November 2018. In December 2018, during the match against Tripura, he scored his maiden double century in first-class cricket. He made his Twenty20 debut for Uttar Pradesh in the 2018–19 Syed Mushtaq Ali Trophy on 21 February 2019.

Naomi Seibt is a German climate change denier. Until April 2020, she was employed by the Heartland Institute, an American conservative and right-wing public policy think tank that marketed her as the "anti-Greta". She has been a speaker at multiple events organized by conservative think tanks. Over her political position, she says, that she is an anarcho-capitalist.

Joshua Thomas Sargent is an American professional soccer player who plays as a forward for Bundesliga club Werder Bremen and the United States national team. In May 2017, at the age of 17, he became the youngest U.S. player to score at the FIFA U-20 World Cup.

Jaxson Reed Hayes is an American professional basketball player for the New Orleans Pelicans of the National Basketball Association (NBA). He played college basketball for the Texas Longhorns.

Maxence Guy Lacroix is a French professional player who plays as a centre-back for Bundesliga club VfL Wolfsburg.

Yuji Nishida is a Japanese male volleyball player.