Betül Tanbay (born 1960) is a Turkish mathematician, scientist and professor of mathematics at the Boğaziçi University in Istanbul, Turkey and the first woman president of the Turkish Mathematical Society between 2010 and 2016.
She graduated from the Lycée Janson de Sailly, Paris, France in 1978.
She received her Licence en Mathématiques from Université Louis Pasteur, Strasbourg in 1982, and her PhD in Mathematics under the supervision of Robert Solovay at the University of California, Berkeley in the United States in 1989.
[2] She has been a full time member and chairwoman in the Department of Mathematics, at Boğaziçi University, Istanbul.
[10] She has held visiting positions at UC Berkeley and UC Santa Barbara, Université de Bordeaux, Institut de Mathématiques de Jussieu, University of Kansas, Pennsylvania State University and joined the Kadison-Singer Conjecture Workshop at the American Institute of Mathematics.