Sanford Myron Zeller (19 October 1885 – 4 November 1948) was an American mycologist.
Born in Coldwater, Michigan, Zeller was educated at Lawrence College in Wisconsin, then Greenville College in Illinois, from which he received a Bachelor of Science degree in 1909. He earned his doctorate in botany in 1917 at Washington University in St. Louis, and two years later started a 29-year stint as a plant pathologist and professor at the Oregon Agricultural Experiment Station in Corvallis, Oregon. He published over 150 scientific papers during his career. Zeller specialized in the gasteroid fungi.
Independently, he described 3 orders, 9 families, 7 genera, 81 species, and published 29 new names and combinations, as well as 3 genera, 62 species, and 59 combinations in collaborations with other scientists. Zeller was the associate editor of the scientific journal Phytopathology from 1924 to 1930.