Agustín Stahl (January 21, 1842 – July 12, 1917) was a Puerto Rican medical doctor and scientist with diverse interests in the fields of ethnology, botany, and zoology.

Born into a Protestant family, he was baptized into the Catholic faith in Aguadilla at about three years of age,[1] town where he also received his primary and secondary education.

Outside work, Stahl's love of nature lead him to conduct investigations and experiments in the fields of ethnology, botany and zoology.

Known in Puerto Rico as Cóbana Negra, this species is currently listed as threatened in the USFW Federal Register, April 5, 1990.

The Puerto Rican sculptor Tomás Batista created a bust to honor Stahl which can be found at the University of Cayey.