Hermann Fischer-Sigwart (23 March 1842 – 23 July 1925) was a Swiss naturalist and conservationist who was a pharmacist by profession.
He then worked at the Karlsruhe pharmacy and studies at the University of Jena where he was influenced by the botanist Matthias Jacob Schleiden.
He then worked in Neuchatel, followed by the Golden Pharmacy in Basel and then returned to manage his father's business in Zofingen.
He published several popular articles and some books including "Tierleben im Aquarium" (animal life in the aquarium), "Betrachtungen über Amphibien und Reptilien" (reflections on amphibians and reptiles) and "Das Gebirge als Rückzugsgebiet für die Tierwelt" (mountains as a retreat for animals).
He was one of the founders of the Schweizerische Naturschutzkommission along with Paul Sarasin, Jakob Heierli, Albert Heim, Hans Schardt, Carl Schroter, Ernest Wiczek, and Friedrich Zschokke.