| Age | 91 (age at death) |
| Birthday | 5 January, 1904 |
| Birthplace | New Bedford, Massachusetts, USA |
| Died | 9 July, 1995 |
| Place of Death | Newton, Massachusetts, USA |
| Zodiac Sign | Capricorn |
| Nationality | American |
| Occupation | Chemist |
William Jacob Knox Jr. (January 5, 1904 - July 9, 1995) was an American chemist at Columbia University in New York City and one of the African American scientists and technicians on the Manhattan Project. Knox held an unprecedented position, serving as the only African American supervisor for the Manhattan Project. Knox is credited for nuclear research of gaseous diffusion techniques used for the separation of uranium isotopes. Knox's efforts in the development of uranium contributed to the atomic bombings of Hiroshima and Nagasaki, Japan, in 1945.
