William George Jacks is an English cricketer. He is a right-handed batter and off spin bowler. He made his Test debut against Pakistan in December 2022.

He made his List A debut on 18 May 2018 for Surrey against Somerset in the 2018 Royal London One-Day Cup. In his third game, in the same competition, he scored a match-winning 121 against Gloucestershire. Prior to his List A debut, he was in the England squad for the 2018 Under-19 Cricket World Cup, where he played all six games, including the last as captain.

In May 2020, Jacks was named in a 55-man group of players to begin training ahead of international fixtures starting in England following the COVID-19 pandemic. In July 2021, he was named in England's One Day International (ODI) squad for home their series against Pakistan, after the original squad for the tour was forced to withdraw following positive tests for COVID-19.

In September 2022, Jacks was named in the England's Test and T20I squad for the away series against Pakistan. He made his T20I debut on 23 September, against Pakistan. His Test debut came against Pakistan in the same tour, on 1 December 2022.