Santiago G. Socino (born 7 May 1992) is an Argentine rugby union player for Gloucester in Premiership Rugby, his primary position is hooker. He previously played for Newcastle Falcons in Premiership Rugby and Jaguares in Super Rugby. Socino moved to England in 2013 to play for Hull RUFC and has also played for Hull Ionians, Darlington Mowden Park, and Rotherham Titans. In February 2021 it was confirmed that he had signed for Gloucester with immediate effect.