Antoine Vieillard de Boismartin (1747 – 13 January 1815) 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.