| Nelson A. Kellogg | |
| Birth Date: | 30 January 1881 |
| Birth Place: | East Richford, Vermont, U.S. |
| Death Place: | Central Lake, Michigan, U.S. |
| Player Sport1: | Track |
| Player Years2: | c. 1904 |
| Player Team2: | Michigan |
| Coach Sport1: | Football |
| Coach Years2: | 1906–1909 |
| Coach Team2: | Northern Illinois State Normal |
| Coach Sport3: | Basketball |
| Coach Years4: | 1906–1910 |
| Coach Team4: | Northern Illinois State Normal |
| Coach Sport5: | Baseball |
| Coach Years6: | 1907–1910 |
| Coach Team6: | Northern Illinois State Normal |
| Admin Years1: | 1910–1917 |
| Admin Team1: | Iowa |
| Admin Years2: | 1919–1930 |
| Admin Team2: | Purdue |
| Admin Years3: | 1934–1939 |
| Admin Team3: | Lehigh |
| Overall Record: | 8–17–3 (football) 17–27 (basketball) 26–17 (baseball) |
Nelson Austin Kellogg (January 30, 1881 – November 23, 1945)[1] was a track athlete, American football, basketball, and baseball coach, and college athletics administrator. He served as the head football coach at Northern Illinois State Normal School—now known as Northern Illinois University—from 1906 to 1909, compiling a record of 8–17–3. Kellogg was also the head basketball coach at Northern Illinois from 1906 to 1910, amassing a record of 17–27, and the head baseball coach at the school from 1907 to 1910, tallying a mark of 26–17. He ran track at the University of Michigan, from which he graduated in 1904.
Kellogg left Northern Illinois to become the University of Iowa's first athletic director in 1910 and served in that capacity until leaving for World War I in 1917. He was the athletic director at Purdue University from 1919 to 1930 and at Lehigh University from 1934 until he retired on February 11, 1939.[2] [3] Kellogg died at the age of 64 on November 23, 1945, at his home in Central Lake, Michigan.[4]