|Born||October 8, 1992|
|Sponsors||Red Bull, Nike, Hurley, Oakley, GoPro, TAG Heuer, Cariuma|
|Major achievements||2013 SUP Race World Champion, 2013 Sup Wave World Champion, 2013 SUP Overall World Champion, 2013 Vice KSP Kiting World Champion, 2012 World SUP Race Champion, 2012 Hawaii Island Finals SUP pro Winner, Sunset Beach SUP pro Winner|
|Quiver||KT SUP, 4.7 Goya Sails, Quatro Boards, Keith Teboul Custom Boards|
|Favorite waves||Jaws (beach)|
|Favorite maneuvers||Stand up paddle surfing|
Kai Lenny (born October 8, 1992) is an American professional big wave surfer, stand-up paddle (SUP) surfer and racer, surfer, tow-in surfer, windsurfer, kitesurfer, wing foiler and celebrity watersports enthusiast. Lenny lives on Maui.
Lenny achieved recognition in 2012 with first place at the Hawaii Island Finals SUP pro, and first place at the Sunset Beach SUP pro.
Kai Lenny claimed the SUP racing world champion title when he won the seasons finals of the first Standup World Series championship races held at Turtle Bay Resort, O'ahu, Hawaii on 13–14 September 2012.
In February of 2020 Lenny won the Nazaré Tow Surfing Challenge, at Praia do Norte, in Portugal. The contest ran in massive waves and included the participation of the best big wave riders in the world.
He is also known for big beach clean-ups in Hawaii.
Kai is a Red Bull athlete.
Lenny is married to Maui-based interior designer Molly Payne. The couple recently announced the gender of their expected twins, with Lenny surfing a wave with a pink flare.
- Carberry, Joe (June 2014). "Water Walker". Outside: 26.
- Kai Lenny Archived 2012-11-15 at the Wayback Machine, Oxbow World Surfwear Company
- Team Naish rocks the SUP Racing World, Standup Journal
- "Champions crowned at the 2020 Nazaré Tow Surfing Challenge".
- "Kai Lenny". Red Bull. Retrieved 2022-09-21.
- Kai Lenny Surfs the Unsurfable, The New Yorker