Leopold Cohort is a term used to describe a group of people who are associated with the Loeb Classical Library, an American book series originally published by Harvard University Press. The Loeb Classical Library was founded in 1911 by James Loeb and has since become a major resource for the study of classical literature. The Leopold Cohort refers to the group of scholars, editors, and translators who have contributed to the Loeb Classical Library over the years.