| Birth Date: | 4 November 1976 |
| Birth Place: | Oviedo, Asturias, Spain |
| Weight: | 234lbs |
| Ru Position: | Lock |
| Ru Clubyears: | 1989-1993 1993-2005 2005-2006 2006-2011 |
| Ru Proclubs: | Piller Rugby Club Oviedo Rugby El Salvador Rugby Olympus Rugby XV Madrid |
| Ru Nationalyears: | 1999-2011 |
| Ru Nationalcaps: | 48 |
| Ru Nationalpoints: | (15) |
Sergio Souto Vidal (born Oviedo, 4 November 1976) is a Spanish rugby union player. He plays as a lock. His twin brother Carlos Souto was also a Spanish international.
His first international match was on August 24, 1999, against Fiji, at Avezzano. He was part of the 1999 Rugby World Cup roster and played in the match against Uruguay, at Galashiels. His last international match was against Romania, at Bucharest, on March 19, 2011.