Johann Heinrich Sulzer was a Swiss physician and entomologist.

He studied medicine at the University of Tübingen and later started a medical practice in Winterthur. As a physician he distinguished himself in his work with smallpox vaccinations. In the field of entomology, he was the author of:
Die Kennzeichen der Insekten, nach Anleitung des Königl. Schwed. Ritters und Leibarzts Karl Linnaeus, (...) (1761) – The characteristics of insects, according to the instructions of Carl Linnaeus.
Abgekürzte Geschichte der Insecten nach dern Linaeischen System (1776) – Abbreviated history of insects according to the Linnaean System.