Ekanem Esu Williams (born 1950) is a Nigerian-born immunologist and a reproductive health and rights activist.
Born in northern Nigeria, Williams was the third of eight children.
[3] In 1985 she returned to Nigeria to take a post at the University of Calabar; two years later she was passed over for promotion, because it was felt that she already had more than a woman could expect.
[4] She served as a research associate at the Population Council in Washington, DC, and Johannesburg, from 1998 to 2007.
There, she has concentrated on the work of HIV/AIDS and reproductive health and rights issues in several sub-Saharan African countries.