Daniel Cady Eaton (September 12, 1834 – June 29, 1895) was an American botanist and author. After studies at the Rensselaer Institute in Troy and Russell's military school in New Haven, he gained his bachelor's degree at Yale College, then went on to Harvard University, where he studied with Asa Gray. He then went to Yale University's Sheffield Scientific School in 1864, where he was a botany professor and herbarium curator. With William Gilson Farlow and Charles Lewis Anderson he issued the exsiccata series Algae exsiccatae Americae Borealis (1877-1889). Eaton is the grandson of Amos Eaton. He also worked in Utah, contributing to the US-Mexican Boundary Survey, and various geological surveys.

Notable publications

Partial list of species named by D. C. Eaton: