Santiago Carreras (born 30 March 1998) is an Argentine professional rugby union player who plays as a fly-half for Premiership Rugby club Gloucester and the Argentina national team.

On 28 December 2018, Carreras was named in the Jaguares squad for the 2019 Super Rugby season.

[citation needed] On 11 December 2020, Carreras would move to England to join Premiership side Gloucester on an undisclosed length deal from the 2020–21 season.

[2] On 5 February 2025, it was announced Carreras would leave Gloucester to join local rivals Bath on a three-year deal from the 2025–26 season.

[3] Carreras was a starter for the Argentina national team on 14 November 2020 in their first ever win against the All Blacks.