Roscoe Wilfred Thatcher was an American agriculturist.
He was born and raised on a farm in Chatham Center, Ohio, and studied at the University of Nebraska.
He began his academic career at Washington State College, becoming head of the Department of Agriculture there. He moved to the University of Minnesota in 1913, initially as head of the Department of Chemistry, and later as Dean of the Department of Agriculture. In 1921 he became director of New York"s State Agricultural Experiment Station, and that year published a book, Chemistry of Plant Life.
He left that position to become president of Massachusetts State College.
He was known for his studies of the chemistry of flour, and the chemistry of insecticides. In 1924 President Coolidge appointed him to the president"s Agricultural Commission.
He died of a cerebral hemorrhage on 6 December 1933.