Seb Atkinson (born 21 May 2002) is an English rugby union player for Gloucester in the Premiership Rugby.
Atkinson is a graduate of the Luctonians club in Herefordshire. He joined the Senior Academy at Sixways in the summer of 2020 having captained Warriors to third place in the 2019-20 Premiership Rugby Under-18s Academy League.
Atkinson was due to captain England Under-18s at the end of the 2019/20 season but their programme was cancelled owing to the Covid-19 pandemic. He was included in England squad for the 2021 Six Nations Under 20s Championship in Cardiff but was not used in any of their five matches in a Grand Slam-winning campaign. He was named in England Under-20s EPS squad for 2022.
Atkinson joined Stourbridge on a dual registration in October 2021. He made his senior debut in the Premiership Rugby Cup win over Gloucester at Sixways Stadium in December 2021 and his Gallagher Premiership debut as a replacement against Sale Sharks in February 2022.
Due to the club entering administration, all Warriors players had their contracts terminated on 5 October 2022. On 17 October 2022, Atkinson signed for local rivals Gloucester ahead of the 2022–23 season, following his Worcester exit.
Atkinson made his Cherry & White debut in a 38–31 victory against Bristol Bears in the Premiership Rugby Cup, scoring a brilliant solo try in the process. With a number of notable performances in the Premiership Rugby Cup, Atkinson has since become regular component of the Cherry & White midfield this season, with many appearances to his name across all competitions. At the end of the season, Atkinson was voted as young player of the season by fans.
On 30 March 2023, Atkinson signed a new deal to stay at Kingsholm, thus promoted to the senior squad ahead of the 2023–24 season.