Ninja Warrior UK (also known as Ninja Warrior UK: Race for Glory) is a British physical obstacle assault course game show, created for ITV. The show is based upon the format of the Japanese game show Sasuke, created by Ushio Higuchi, which is aired in the United Kingdom and other countries as Ninja Warrior.

Presented by Ben Shephard, Chris Kamara and Rochelle Humes, the show focuses on around 250 contestants (160 in series 4–5) tackling a difficult assault course featuring a variety of obstacles, the most notable being the Warped Wall. Contestants advance in the competition by achieving a fast enough time or progressing far enough along the course. The competition culminates with a final, in which the contestant who goes furthest fastest is declared "Last Ninja Standing". If a competitor completes the final obstacle, Mt Midoriyama, in under 45 seconds, they will be declared winner of the contest and crowned "Ninja Warrior UK".

Dubbed the "Toughest course on TV", the show originally aired five series between 2015 and 2019, including one celebrity special episode aired as part of the Text Santa telethon on 18 December 2015. The first competitor to complete the entire course was Tim Champion, beating Mt Midoriyama in the fifth series. After a three-year hiatus, the show returned in September 2022, this time under the name Ninja Warrior UK: Race for Glory, which featured contestants racing against each other. Beth Lodge and Fred Dorrington are the most recent champions, beating Midoriyama in the sixth series (Race for Glory).