Sébastien Dewaest (born 27 May 1991) is a Belgian professional footballer who plays as centre-back for Challenger Pro League club Francs Borains.

In January 2011 he signed a professional contract with Roeselare.

In his second season, he played 22 league games in which he scored a goal.

He signed a two-year contract with an option in two additional years.

[1] In August 2024, Dewaest signed a one-year contract with Challenger Pro League club Francs Borains.