Orestes St. John

Orestes Hawley St. John
Born(1841-01-12)January 12, 1841
DiedJuly 20, 1921(1921-07-20) (aged 80)
MonumentsMount Saint John, Wyoming
Alma materHarvard University
Occupation(s)Geologist, paleontologist, scientific illustrator
EmployerU.S. Geological Survey

Orestes Hawley St. John (January 12, 1841 – July 20, 1921) was an American geologist, paleontologist, and scientific illustrator specializing in the study of Paleozoic fossil fish. He trained under Louis Agassiz and worked extensively with the U.S. Geological Survey, participating in the Hayden Geological Survey of 1871.