Brian Joseph Chesky (born August 29, 1981) is an American businessman and industrial designer and the co-founder and CEO of Airbnb. Chesky is the 290th richest person in the world according to Forbes, with a net worth of $9.2 billion, largely due to his 10 percent ownership stake in Airbnb.

Brian Chesky was born on August 29, 1981, in Niskayuna, New York, the son of Deborah and Robert Chesky; His father is of Polish and his mother of French origin. Chesky's parents were both social workers. He has a younger sister, Allison. Chesky enjoys sketching and bonsai. He later acquired Polish and French citizenship through the naturalization of his parents.

As a child, Chesky's first hobby was ice hockey. He developed an interest in art in his teens and cited Leonardo da Vinci as an early inspiration. He drew replicas of paintings and redesigned toys and shoes. In an interview with The New York Times, he said he watched friends of his parents redesign their backyard, which led to an interest in landscape architecture and later urban planning.

Chesky graduated from Niskayuna High School in 1999 and graduated from the Rhode Island School of Design (RISD) in 2004 with a Bachelor of Fine Arts degree in industrial design. While studying at RISD, Chesky was influenced by the works of Charles Eames, Ray Eames, and Walt Disney. He was captain of the RISD hockey team and was a competitive bodybuilder. Chesky was also the designer of the unofficial mascot of RISD, Scrotie.

Chesky moved to Los Angeles following graduation from RISD to work for 3DID as an industrial designer. He designed toys, guitars, medical equipment, and other items at 3DID. Chesky became disillusioned with the job and long commutes, particularly after being part of a team that worked on the Pureflush toilet seat for the television show American Inventor. He reduced his hours at 3DID in 2007 to work on furniture designs.

In October 2007, he moved to San Francisco to live with RISD classmate Joe Gebbia. Chesky did not have enough money to pay his rent, and they opened their house to short-term renters as a bed and breakfast, providing air mattresses for guests to sleep on and Pop-Tarts for breakfast during the Industrial Designers Society of America conference, when hotel rooms were scarce. The business became Airbnb.

Gebbia and Chesky asked Nathan Blecharczyk to work on a new website for the company, then known as Airbed & Breakfast. The site launched before 2008's South by Southwest (SXSW) in Austin, Texas, and generated two bookings, one of which was Chesky. He met Michael Seibel at SXSW, who would later connect him with Y Combinator and led to significant investment for Airbnb. The company re-launched again before the 2008 Democratic National Convention in Denver, Colorado. It was featured in TechCrunch, driving so much traffic to the company website that it crashed. Chesky and his partners targeted microblogs to advertise the service, which led to a trickle-up to larger Denver-area publications including the Denver Post, then national publications including The New York Times. The strategy led to 800 room listings and 80 guest bookings.

Chesky and Gebbia had US$20,000 in debt each after the Democratic National Convention. They developed and designed election-themed cereal boxes to generate funds. They purchased 1,000 boxes of commercial cereals and repackaged them as "Obama O's" and "Cap'n McCains". Sales of the rebranded cereal generated between US$20,000–US$30,000 and allowed the two to pay most of their debts.