Jeff Jason Reine-Adélaïde (born 17 January 1998) is a French professional footballer who plays as a midfielder for Serie B club Salernitana.

Born in Champigny-sur-Marne, Reine-Adélaïde started his career with RC Lens where he played for the club's youth and reserve sides.

[4] He made his professional debut for Arsenal on 9 January 2016 against Sunderland in the FA Cup, coming on as an 81st-minute substitute for Joel Campbell in a 3–1 win at the Emirates Stadium.

[6] Adélaïde made six appearances for the club's first team during the 2016–17 season, with the last of those caps coming in Arsenal's FA Cup quarter-final win against Sutton United.

[13] On 6 September 2023, recently-promoted to Belgian Pro League side RWD Molenbeek announced the signing of Reine-Adélaïde on a one-year contract with an option for a further year.