Talithia D. Williams is an American statistician and mathematician at Harvey Mudd College who researches the spatiotemporal structure of data.^[1][2] She was the first black woman to achieve tenure at Harvey Mudd College.^[2] Williams is an advocate for engaging more African Americans in engineering and science.^[3]

Her educational background includes a bachelor's degree in Mathematics from Spelman College, Master's degrees in both Mathematics from Howard University and Statistics from Rice University, and a Ph.D. in Statistics from Rice University.^[4] Williams was in one of the first EDGE cohorts.^[5] She is a winner of the Thomas J. Watson Fellowship.

Williams has worked at the Jet Propulsion Laboratory (JPL), the National Security Agency (NSA), and NASA.^[1][6] She is an associate professor of mathematics and also serves as Associate Dean for Research and Experiential Learning at Harvey Mudd College.^[7][1][6] She is Secretary and Treasurer for the EDGE Foundation which sponsors summer programs for women, and on the boards of the MAA and SACNAS.^[1] Williams has done significant outreach, with the goal of bringing mathematics to life and "rebranding the field of mathematics as anything but dry, technical or male-dominated but instead a logical, productive career path that is crucial to the future of the country."^[4][8]

Williams has developed statistical models focused on understanding the structure of spatiotemporal data, with environmental applications.^[1][9] She has partnered with the World Health Organization in developing a cataract model used to predict the cataract surgical rate for countries in Africa.^[9]

Williams was a host of the six part PBS series NOVA Wonders in April 2018.^[10] She is the author of the book Power in Numbers: The Rebel Women of Mathematics (Race Point Publishing, 2018).^[11][12] Williams was the narrator for the five-part PBS series NOVA Universe Revealed in November 2021.^[13]

In 2015 Williams received the MAA Henry L. Alder Award for exemplary teaching by an early career mathematics professor.^[14] Williams was honored by the Association for Women in Mathematics and the Mathematical Association of America, when they selected her to be the AWM/MAA Falconer Lecturer at MathFest 2017 in Chicago, IL.^[15] The title of her talk is "Not So Hidden Figures: Unveiling Mathematical Talent." Williams was also recognized by Mathematically Gifted & Black as a Black History Month 2017 Honoree.^[16] She received the 2022 Joint Policy Board for Mathematics Communication Award "for bringing mathematics and statistics into the homes of millions through her work as a TV host, renowned speaker, and author."^[17][18]