Clasina Isings (15 February 1919 – 3 September 2018) was a Dutch professor of classical archeology. From 1961 to 1995, she managed the collection of the Provincial Utrecht Society of Arts and Sciences (PUG). She was born in Soest, Netherlands. She also worked at University of Utrecht.
Isings died in Bilthoven, Netherlands on 3 September 2018 at the age of 99.