Marcellus Hartley Dodge Sr. (February 28, 1881 – December 25, 1963) was the chairman of the board of Remington Arms Company and a member of the family associated with the Phelps Dodge Corporation. He was the president or director of several companies and the president of YMCA in the United States. He was a well-known philanthropist with significant donations to many institutions and organizations and he was a major contributor to the successful efforts to protect the Great Swamp.