Joseph-Balthazar Bonet de Treyches (28 March 1757 – 8 August 1828) was a politician during the French Revolution.
He became a judge of peace in the district of Monistrol-sur-Loire and administrator of the Haute-Loire department at the beginning of the French Revolution, while his father sat on the Estates General of 1789.
Linked to the Girondins, without really being part of their group, he was charged on 3 October 1793, but managed to take refuge in Switzerland while his father was imprisoned in Le Puy, accused of federalism.
Until 1797, he was a member of the Council of Five Hundred, then was appointed as Government Commissioner of the Théâtre de la République et des Arts, as co-director and then interim director.
From December 1802 to September 1803, he was accounting agent for the same Opera under the direction of Étienne Morel de Chédeville and then became director again until 1807.