Digvijai Singh (December 11, 1934 - July 20, 2018) was an Indian mechanical engineer and a former vice chancellor of the University of Roorkee before its reconstitution as the Indian Institute of Technology, Roorkee.
He was also a former vice chairman of the All India Council for Technical Education (AICTE) and a former director of Central Road Research Institute.
He is known for his studies on dynamics of single track vehicles and Fluid film lubrication and was an elected fellow of all the three major Indian science academies viz.
Indian National Science Academy, Indian Academy of Sciences, and the National Academy of Sciences, India as well as the Indian National Academy of Engineering.
The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards for his contributions to Engineering Sciences in 1978.