Jean Louis Debilly (French pronunciation: [ʒɑ̃ lwi dəbili]), General of Brigade in the Grande Armée, was born 30 July 1763 in Dreux, Eure-et-Loir, France, and died 14 October 1806, in the French victory over the Kingdom of Prussia at the Battle of Jena–Auerstedt.

He was badly wounded at the French defeat at the First Battle of Zurich[1] in early June 1799, and was unable to ride a horse for several months.

Massena promoted him to brigadier general, and assigned him to a staff position as chief artillery and engineers of the III.

Jean Louis Debilly commanded the leading brigade of French infantry marching on Hassenhausen in late morning of 14 October.

Another son, Eduard Louis Daniel Debilly (1802–1874) was general of ponts et chaussées (bridges and pavement).