Pierre-Maximilien Delafontaine (1777, Paris - 1 December 1860, Paris) was a French painter. After a long illness he re-established himself as a bronze sculptor.
The son of Jean-Baptiste-Maximilien Delafontaine and Marie-Louise de La Brière, he studied under David. He exhibited at the Paris Salons 1798 and 1799. According to the Salon catalogues, he lived at 123 rue Saint-Honoré, in the Hôtel d'Aligre. On 23 June 1800 he married Émilie-Claude Herbillon from the Pont-sur-Seine.
- Paris, Hôtel de la Monnaie, Portrait of the engraver Bertrand Andrieu.
- Paris, Musée du Louvre, Portrait of Alexandre Lenoir, curator of the Musée des Monuments français (1761–1839), before the tomb of Francis I of France at the museum .
- Versailles, Musée national du château de Versailles et de Trianon, Portrait of Marie-François-Xavier Bichat, doctor and anatomist (1771–1802) near the antique bust of the chirurgien anatomiste De Sault