Hubert Lyman Clark, Ph. D. (January 9, 1870 – July 31, 1947) was an American zoologist.
Clark, son of William Smith Clark, was born at Amherst, Massachusetts, and educated at Amherst College and Johns Hopkins University.
From 1899 to 1905 he was professor of biology at Olivet College. Beginning in 1905, Clark worked as assistant in invertebrate zoology at the Museum of Comparative Zoology at Harvard University. He was curator of echinoderms from 1910 to 1927, and curator of marine invertebrates and associate professor of zoology beginning 1927. He was awarded the Clarke Medal by the Royal Society of New South Wales in 1947.
He carried on scientific investigations in Jamaica, Bermuda and Torres Strait, Australia, and published many papers dealing with birds, snakes, echinoderms and flowers. His publications include:
- The Birds of Amherst and Vicinity (1887)
- The Echinoderms of Porto Rico (1901)
- A New Ophiuran from the West Indies (1910)
- North Pacific Ophiurans in the Collection of the United States National Museum (1911)
He contributed to the New International Encyclopaedia and the Dictionary of American Biography.