Arnaud Costes (born 16 June 1973) is a French former international rugby union footballer who also played for France national team.
As flanker he played for several French clubs: he debuted in the French championship in 1993 with Montferrand, where he also won the 1998–99 European Challenge Cup; in 2000 he moved to Castres for which he played until 2002; he then played the 2002–03 season with Bourgoin-Jallieu then ended his professional career at Béziers (2003–2005).
Finally he moved at 34 to the amateur club Gaillac in Fédérale 3 where he closed definitely his career as player in 2007, aged 36.
Since retirement he has managed the amateur club Rugby Olympique de Castelnaudary, (Fédérale 3).
This biographical article relating to French rugby union is a stub.