Arthur Johnson Eames (October 10, 1881 – February 12, 1969) was an American botanist who spent over 50 years as faculty member and emeritus professor of botany at Cornell University, known for his work on flower anatomy and plant morphology. He served as president of the Botanical Society of America in 1938, was a member of the American Academy of Arts and Sciences, and received an honorary LL.D. from the University of Glasgow in 1950.