Antoine Vieillard de Boismartin, (1747 in Paris – 13 January 1815 in Saint-Lô) was a French lawyer and playwright.
Before the French Revolution, Vieillard de Boismartin was a lawyer at parlement de Rouen. He later held several political and judicial positions, including three times mayor of Saint-Lô.
The father of poet and critic Pierre-Ange Vieillard, Vieillard de Boismartin was a member of the Légion d’honneur.