(Hyppolyte) Louis Alexandre Dechet (alternatively, spelled Dechez; Lyon, 20 January 1801 - Lier, 18 October 1830) was a French actor and is regarded the author of the lyrics of the Brabançonne, the Belgian national anthem.
He died during a combat against the Dutch near Lier.
On the Martelarenplein in Brussels a column honouring Dechet is to be found, which was created by Alfred Crick and inaugurated in 1897.