Jean Baptiste Louis Pierre (23 October 1833 – 30 October 1905), also known as J. B. Louis Pierre, was a French botanist known for his Asian studies. Pierre was born in Saint-André, Réunion, and studied in Paris before working in the botanical gardens of Calcutta, India. In 1864 he founded the Saigon Zoo and Botanical Gardens, which he directed until 1877, after which he returned to Paris where he lived at 63 rue Monge, close to the Paris Herbarium. In 1883 he moved to Charenton, then to Villeneuve-Saint-Georges, then (circa 1893) to Saint-Mandé, and finally to 18 rue Cuvier in Paris, where he lived until his death.