Gerard Troost
| Gerardus Troost | |
|---|---|
| Born | March 5, 1776 | 
| Died | August 14, 1850 (aged 74) | 
| Nationality | American-Dutch | 
| Scientific career | |
| Fields | Mineralogy, biology | 
Gerardus Troost (March 5, 1776 – August 14, 1850) was a Dutch-American medical doctor, naturalist, mineralogist, and founding member and first president of the Philadelphia Academy of Natural Sciences.