Jérôme Thion (born 2 December 1977 in Senlis, Oise) is a French rugby union footballer who currently plays for Biarritz Olympique in the Top 14 club competition in France. Thion, one of the most hard-working and underrated locks in world rugby, has played for France since 2003, representing them at the 2003 Rugby World Cup in Australia as well as captaining them in three tests in late 2005. He was also a part of the 2006 Six Nations Championship-winning side.