Ralph H. Hopping (April 8, 1868, New York City – October 29, 1941) was an American-born Canadian entomologist who specialized in Coleoptera (beetles and weevils).
In 1912, he held the post of Forest Entomologist, and was based in San Francisco.
In 1919, he was offered, and accepted, the post of Entomologist-in-Charge at the Vernon Laboratory in British Columbia, Canada.
He directed his energies not simply towards scientific inquiry, but especially towards control of bark beetles; a notorious pest in the Canadian forestry industry.
In 1948, his widow, Eltha Edwards, donated his beetle collection to the Entomology Department of the California Academy of Sciences.