Sébastien Loubsens (born 15 February 1973) is a French-born former Spanish rugby union player.

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.

He was part of the 1999 Rugby World Cup roster, where he played the first two matches for Spain.

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