Sébastien Maillard (born 2 May 1981, in Migennes) is a male hurdler from France.
He finished 5th in the 400m hurdles final at the 2006 European Athletics Championships in Gothenburg. He was a semi-finalist in the same event at the 2003 World Championships in Paris. As a junior, he competed in the decathlon.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 1999 | European Junior Championships | Riga, Latvia | 6th | 400 m hurdles | 52.55 | |
| 2000 | World Junior Championships | Santiago, Chile | — | Decathlon | DNF | |
| 2001 | European U23 Championships | Amsterdam, Netherlands | 7th | Decathlon | 7562 pts | |
| 2003 | European U23 Championships | Bydgoszcz, Poland | 6th | 400 m hurdles | 50.28 | |
| 5th | 4 × 400 m relay | 3:06.79 | ||||
| World Championships | Paris, France | 23rd (sf) | 400 m hurdles | 50.70 | ||
| 2005 | Mediterranean Games | Almería, Spain | 4th | 400 m hurdles | 50.71 | |
| 2006 | World Indoor Championships | Moscow, Russia | 6th | 4 × 400 m relay | 3:09.55 | |
| European Championships | Gothenburg, Sweden | 5th | 400 m hurdles | 49.54 | ||
| 2009 | Mediterranean Games | Pescara, Italy | bgcolor=gold | 1st | 400 m hurdles | 49.80 |
| Jeux de la Francophonie | Beirut, Lebanon | bgcolor=silver | 2nd | 400 m hurdles | 50.35 | |
| 7th | 4 × 100 m relay | 40.73 | ||||
| 4th | 4 × 400 m relay | 3:11.43 | ||||
| 2010 | European Championships | Barcelona, Spain | 14th (sf) | 400 m hurdles | 51.26 | |