| Birth Date: | 15 February 1973 |
| Birth Place: | France |
| Weight: | 184lbs |
| Ru Position: | Centre |
| Ru Amateuryears: | 1990-1994 |
| Ru Amateurclubs: | Stade Montois |
| Ru Clubyears: | 1994-2001 2001-2003 2004 2005 2006-2007 2007-2008 2008-2009 |
| Ru Proclubs: | Bordeaux-Bègles Stade Montois Bordeaux-Bègles US Oyonnax Stade Montois Grenade Sur l'Adour CAPBRETON |
| Ru Nationalyears: | 1999-2005 |
| Ru Nationalcaps: | 19 |
| Ru Nationalpoints: | (25) |
Sébastien Loubsens (born 15 February 1973) is a French-born former Spanish rugby union player. He played as a centre.
He evoluted to the highest level in Club athlétique Bordeaux-Bègles Gironde and ended his professional career on 2008, playing for Grenade Sur l'Adour. Currently he works as rugby pundit for Top 14 for Canal+.
Before joining the Spain national team, he had several caps with France A and France 7s. He debuted for Spain in 1999, during a test match against Japan at Tokyo, on 20 August 1999. He was part of the 1999 Rugby World Cup roster, where he played the first two matches for Spain. His last cap was against Andorra, at Andorra La Vella on 13 February 2005.