Tolullah Oni is a Public Health Physician Scientist and urban epidemiologist, a Clinical Senior Research Associate and joint lead of the Global Public Health at the University of Cambridge MRC Epidemiology Unit, and Honorary Associate Professor in Public Health at the University of Cape Town.

Born in Lagos, she completed her medical training at University College London, postgraduate medical training in the UK and Australia, a Masters degree in Public Health (Epidemiology) at the University of Cape Town, and a research doctorate in Clinical Epidemiology at Imperial College London. She leads the Research Initiative for Cities Health and Equity (RICHE) conducting transdisciplinary urban health research generating evidence to support development and implementation of healthy public policies in rapidly growing cities, with a focus on Africa.

She serves on several advisory boards including Future Earth and the African Academy of Science Open Research Platform; and is an editorial board member of Lancet Planetary Health, Cities and Health, and the Journal of Urban Health.

Profiled in the Lancet (2016), Science magazine (2018), and the British Medical Journal (2019), she is a Fellow of the African Academy of Sciences, immediate past co-chair of the Global Young Academy, 2015 Next Einstein Forum Fellow, and a 2019 World Economic Forum Young Global Leader.