| Harry Nelly | |
| Birth Date: | 1 January 1878 |
| Birth Place: | West Virginia, U.S. |
| Death Place: | Chicago, Illinois, U.S. |
| Player Years1: | 1899 |
| Player Team1: | Army |
| Coach Years1: | 1908–1910 |
| Coach Team1: | Army |
| Overall Record: | 15–5–2 |
Henry Meredith Nelly (January 1, 1878 – December 14, 1928) was an American college football player and coach and United States Army officer. He served as the head football coach at the United States Military Academy from 1908 to 1910, compiling a record of 15–5–2. Nelly was born on January 1, 1878, in West Virginia.[1] He died in 1928.[2]