Hobart Muir Smith (born Frederick William Stouffer, on September 26, 1912 in Stanwood, Iowa, U.S.) is an American herpetologist. He has been credited with describing several new species of North American reptile and amphibian, as well, he has been honored by having a species blackhead snake named after him, Tantilla hobartsmithi.

Smith attained his bachelor of science in 1932 from Kansas State University, under Howard K. Gloyd, and attained his masters (in 1933) and doctorate (in 1936) at the University of Kansas under Dr. Edward Harrison Taylor. Where his thesis was a revision of the lizard genus Sceloporus. He also participated in several specimen collecting trips to Mexico.

In 1936 Smith was awarded a National Research Council Fellowship at the University of Michigan, where he worked with several other researchers to write and publish The Mexican and Central American Lizards of the Genus Sceloporus. In 1937 he worked for both the Chicago Academy of Sciences and the Field Museum of Natural History. He was given a fellowship by the Smithsonian Institution to collect specimens in Mexico, and collected over 20,000. From 1941 until 1945 he was a zoology professor at the University of Rochester, in New York. In 1945 he returned to the University of Kansas as an associate professor and wrote the Handbook of Lizards, Lizards of the US and Canada. In 1946 he moved to Texas and became an associate professor of wildlife management at Texas A&M University and wrote Checklist and key to snakes of Mexico and Checklist and key to amphibians of Mexico with Taylor. From 1947 until 1968 he was a professor of zoology at the University of Illinois at Urbana-Champaign. He retired in 1968 and moved to Boulder, Colorado, where he became a professor of biology at the University of Colorado. In 1972 he became chairman of, what is now, the Department of Ecology and Evolutionary Biology. In 1983 he retired, becoming a professor emeritus and continued his personal research with over 880 publications, including 29 books.

At 95 years of age, Hobart Smith continues to be an active and productive herpetologist. Having published 1602 manuscripts as of 2006, he has surpassed all contemporaries and remains the most published herpetologist of all time.

Born Frederick William Stouffer in 1912, he was adopted in 1916 by Charles and Frances Smith, farmers. In 1938 he married Rozella Pearl Beverly Blood (then Rozella Pearl Beverly Blood Smith, 1911 - 1987), who helped him publish his extensive collection of herpetological notes.