Josiah Hoopes (November 9, 1832 – January 16, 1904) was an American botanist specializing in arboriculture.

He founded one of the largest commercial plant nurseries in the United States in his hometown of West Chester, Pennsylvania.

Hoopes supplied fruit trees to all the country's national cemeteries and sold overseas in Europe and Australia.

[2][1] Hoopes was lifelong friends with botanists David Townsend and William Darlington.

He collected taxidermy birds, nearly eight thousand of which were acquired by the Philadelphia Academy of Natural Sciences, and served as a trustee of West Chester State Normal School for fifteen years.