Morton John Elrod (27 April 1863 - 19 January 1953) was an American ecologist and professor at the University of Montana. He founded the Flathead Lake Biological Station in 1899. It was established to encourage research and field education and has been the site of numerous long-term biological studies. He was also appointed by the American Bison Society to examine potential reserves in Montana which led to the establishment of the National Bison Range. A keen photographer and researcher, he conducted research and wrote several books on a variety of topics. A number of species have been named in Elrod's honor by researchers.