Y. P. Varshni (born 1932) is a scientist in the areas of physics and astrophysics. Varshni studied at Allahabad University, where he obtained his BSc in 1950, his MSc in 1952, and his PhD in 1956. He published his first research paper in 1951 at the age of 19. He served as an assistant professor in the Physics Dept., Allahabad University for the period 1955–60. He has published more than 260 research papers in important scientific journals. Varshni has also contributed three biographies to the Biographical Encyclopedia of Astronomers.