Alpheus Spring Packard, LL.D. (February 19, 1839 – February 14, 1905) was an American entomologist and palaeontologist. He was the son of Alpheus Spring Packard, Sr. (1798-1884) and the brother of William Alfred Packard. He was born in Brunswick, Maine and was Professor of Zoology and Geology at Brown University in Providence, Rhode Island from 1878 until his death. He was a vocal proponent of the Neo-Lamarckian theory of evolution. His chief work was the classification and anatomy of arthropods, and contributions to economic entomology, zoogeography, and the phylogeny and metamorphoses of insects. He wrote school textbooks, such as Zoölogy for High Schools and Colleges (eleventh edition, 1904). His Monograph of the Bombycine Moths of North America was published in three parts (1895, 1905, 1915, edited by T. D. A. Cockerell).