John Aston Warder (January 19, 1812 – July 14, 1883) was a physician, influential leader in the fields of horticulture and forestry, and founder of the American Forestry Association. He was among the first to propose the planting of belts of trees on the great western plains. He died at the John Aston Warder House in North Bend, Ohio in 1883. The standard author abbreviation Warder is used to indicate this person as the author when citing a botanical name.