Ivan Zupančič is a Slovenian physicist. He was born in 1930 in Ljubljana, and died in 1999.
In 1955 Zupančič graduated from the Faculty of Natural Sciences and Mathematics in Ljubljana, and in 1965 received his PhD at the Faculty of Natural Sciences and Technology in Ljubljana. He was professionally trained in Cambridge (UK). In 1954, he was employed at the Jožef Stefan Institute in Ljubljana. In 1970-1996, he lectured at the Department of Physics FMF in Ljubljana, since 1983 as an associate professor.
Dr Zupančič participated in the research of phase transitions in ferroelectric crystals with a hydrogen bond. He built a system that ensured homogeneity of the magnetic field and was later important for the development of tomography. He made devices for measuring nuclear magnetic resonance. He published more than 100 scientific papers in international journals.