List of Famous people who are 40

Evan Sharp is an American billionaire Internet entrepreneur. He is the co-founder and chief design and creative officer of Pinterest, a visual discovery engine. He joined the company's board of directors in March 2019.

Steven Caethoven is a Belgian former professional road bicycle racer.

Teunis ("Teun") Mulder is a Dutch track cyclist. He is a former keirin World Champion and won a silver in the team sprint with Theo Bos and Tim Veldt. Mulder also won four world cup classics in the team sprint and keirin. He competed for his native country at the 2004 Summer Olympics in Athens, Greece, finishing 10th at the individual sprint, 6th at the team sprint and 11th at the 1 km time trial, while he was eliminated in the first repechage round of the keirin competition. At the 2012 Summer Olympics, he won the bronze medal in the men's keirin.

Tommy Karevik Paige is a Swedish metal vocalist, best known as the singer for metal bands Seventh Wonder and Kamelot.

Giairo Ermeti is an Italian former professional road bicycle racer, who competed as a professional between 2005 and 2013.

Patapol Ngernsrisuk is a male badminton player from Thailand. He competed in badminton at the 2004 Summer Olympics in men's doubles with partner Sudket Prapakamol. They were defeated in the round of 32 by Anthony Clark and Nathan Robertson of the United Kingdom. In 2007, he won the gold medals at the Summer Universiade in the men's doubles and mixed team event.

Julien Mazet is a French professional road bicycle racer.