| T. Nelson Metcalf | |
| Birth Date: | 21 September 1890 |
| Birth Place: | Elyria, Ohio, U.S. |
| Death Place: | Santa Barbara, California, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1909–1911 |
| Player Team2: | Oberlin |
| Player Positions: | End, tackle |
| Coach Sport1: | Football |
| Coach Years2: | 1912 |
| Coach Team2: | Oberlin (assistant) |
| Coach Years3: | 1913 |
| Coach Team3: | Oberlin |
| Coach Years4: | 1915–1917 |
| Coach Team4: | Columbia |
| Coach Years5: | 1919–1921 |
| Coach Team5: | Columbia |
| Coach Years6: | 1922–1923 |
| Coach Team6: | Minnesota (assistant) |
| Admin Years1: | 1924–1933 |
| Admin Team1: | Iowa State |
| Admin Years2: | 1933–1956 |
| Admin Team2: | Chicago |
| Overall Record: | 33–13–4 |
| Championships: | 1 OAC (1913) |
Thomas Nelson "Nellie" Metcalf (September 21, 1890 – January 17, 1982) was an American football and basketball player, track athlete, coach of football and track, professor of physical education, and college athletics administrator. He served as the head football coach at Columbia University (1915–1917) as well as his alma mater, Oberlin College (1913, 1919–1921), compiling a career college football record of 33–13–4. From 1924 to 1933, Metcalf taught at Iowa State University in the physical education department and served as the school's athletic director. He then moved on to the University of Chicago, where he was the athletic director from 1933 to 1956. At Chicago, he replaced Amos Alonzo Stagg, who was forced into retirement at the age of 70 after 40 years of service as the school's athletic director and head football coach.[1]