Sibte Hasan Zaidi (15 April 1918 – 5 April 2008) was an Indian pathologist and toxicologist. After his training in pathology at the Hammersmith Hospital in London, United Kingdom, he returned to India to continue experimental toxicology research initially at the Central Drug Research Institute, and then as Founding Director at Industrial Toxicology Research Center (ITRC) in Lucknow (1965-1978) (now renamed as Indian Institute of Toxicology Research, IITR). During his later years, he served on national and international (mainly World Health Organization) committees to increase awareness and set policy to prevent the harmful effects of industrial toxins in people.