Billy Steven Knott (born 28 November 1992) is an English footballer who plays as a midfielder for Essex Senior League club Saffron Walden Town.

He played one game for the club and spent periods on loan at AFC Wimbledon, Woking, Wycombe Wanderers, and Port Vale.

Knott joined the Academy at West Ham United at the age of ten before moving with his family to Spain after his mother was diagnosed with lupus.

[6] Knott joined Terry Brown's League Two side AFC Wimbledon on loan on 11 January 2012,[7] and made his debut in a 2–1 win against Port Vale three days later.

[9] The 19-year-old received the "Dons" Young Player of the Year award, despite only playing half the 2011–12 season, having scored three goals in twenty appearances.

[15] Knott scored eight goals in twenty league games, and returned to the Stadium of Light, at the end of Woking's season, after a 2–1 defeat to Tamworth.

[16] Manager Paolo Di Canio handed him his Sunderland debut on 19 May 2013, the last day of the 2012–13 Premier League season, coming on as a substitute in a 1–0 defeat to Tottenham Hotspur at White Hart Lane.

[31] On 24 January, he played the first 80 minutes of City's 4–2 FA Cup giant-killing of Premier League champions Chelsea at Stamford Bridge, which he described as the greatest achievement of his career.

[33] In the next round he helped Bradford beat another Premier League team, as they ran out 2–0 winners over his former club Sunderland.

Having struggled with depression for years, his tough time at Spotland led him to drink heavily and as a result he contacted the Professional Footballers' Association; speaking in May 2018 he stated that "I know I still have a way to go but I will get through this".

[47] On 4 June 2018, following his release from Lincoln, Knott dropped down two tiers to join National League South side Concord Rangers.

[48] On the opening day of the 2018–19 campaign, he made his Concord debut during their 2–0 home victory over Gloucester City, featuring for 86 minutes before being replaced by D'sean Theobalds.

[50] On 15 March 2019, Knott signed for fellow Essex-based National League South club Chelmsford City.

[64] Ahead of the 2023–24 season, Knott re-signed for Concord Rangers and went on to feature on 21 occasions as the club were relegated from the Isthmian League Premier Division.

[67] Brian Eastick selected Knott and Sunderland teammate Blair Adams in the 21 man squad for the 2011 FIFA U-20 World Cup in Colombia.