|Born||October 8, 1992|
|Sponsors||Red Bull, Nike, Hurley, Oakley, GoPro|
|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 bords|
|Favorite waves||Jaws (beach)|
|Favorite maneuvers||Stand up paddle surfing|
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 Lenny is engaged to marry Maui-based interior designer Molly Payne. The couple recently announced the gender of their expected twins. Kai let the world know that Molly is carrying girls by surfing his home wave, Peahi (Jaws) with pink smoke. He is very excited to become a "girl daddy."
- 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".