Archibald Ross MacKechnie (December 24, 1895 – August 15, 1967) was an American college football coach and United States Army officer. He served as the head football coach at Mississippi State College—now known as Mississippi State University—from 1933 to 1934, compiling a record of 7–12–1.[2][3] A captain in the Army at the time, MacKechnie also had responsibility for instructing the Reserve Officers' Training Corps program at the time.[4]