Brigadier General James Creel Marshall (15 October 1897 – 19 July 1977) was a United States Army Corps of Engineers officer who was initially in charge of the Manhattan Project to build an atomic bomb during World War II. Marshall left the Army in 1947, and moved to Riverside, Connecticut, where he worked for M. W. Kellogg. He later joined Koppers, building a coal loading facility in Turkey, and worked on mining projects in Africa. He was Commissioner of Highways in Minnesota from 1961 to 1965.