Pierre Jean Georges Cabanis was a French physiologist, freemason and materialist philosopher.

Pierre Jean Jouve was a French writer, novelist and poet. He was nominated for the Nobel Prize in Literature five times. In 1966 he was awarded the Grand Prix de Poésie by the French Academy.

Pierre Kaan was a professor of philosophy, Marxist essayist, and prominent member of the French Resistance during the Second World War.

Pierre Klossowski was a French writer, translator and artist. He was the eldest son of the artists Erich Klossowski and Baladine Klossowska, and his younger brother was the painter Balthus.

Pierre La Mure (15 June 1909 – 28 December 1976) was a French author.

Pierre Casimir Hyppolyte Lachambeaudie was a 19th-century French fabulist, poet, goguettier and chansonnier, as well as a follower of Saint-Simonianism.

Pierre Laujon was a French playwright and chansonnier. He was uncle to the playwright Pierre-Yves Barré.

Pierre le Pesant, sieur de Boisguilbert or Boisguillebert was a French lawmaker and a Jansenist, one of the inventors of the notion of an economic market.

Pierre Le Roy (1717–1785) was a French clockmaker. He was the inventor of the detent escapement, the temperature-compensated balance and the isochronous balance spring. His developments are considered as the foundation of the modern precision clock. Le Roy was born in Paris, eldest son of Julien Le Roy, a clockmaker to Louis XV who had worked with Henry Sully, in which place Pierre Le Roy succeeded his father. He had three brothers: Jean-Baptiste Le Roy (1720-1800), a physicist; Julien-David Le Roy (1724–1803), an architect; and Charles Le Roy (1726–1779), a physician and encyclopédiste.

Pierre Lemaitre is a Prix Goncourt-winning French author and a screenwriter, internationally renowned for the crime novels featuring the fictional character Commandant Camille Verhœven.