George Willard Martin (October 27, 1886 – September 11, 1971) was an American mycologist. He was born in Brooklyn, New York, and received a Bachelor of Literature degree in 1912, and a Master of Science degree in 1915, both from Rutgers University. He received a PhD from the University of Chicago in 1922, under the direction of Thurlow Christian Nelson and Henry Chandler Cowles, and published the results of his research in the Botanical Gazette in 1923 with the title "Food of the Oysters". Afterward, he began work at the University of Iowa, where he became a Professor, and was Head of the Department of Botany from 1953 to 1955. He became an Emeritus Professor, and was still active in his studies until after he turned 80. Martin was the Associate Editor for Mycology of the journal The American Midland Naturalist.