In this paper, the brain drain of Information Technology (IT) graduates from Türkiye is examined on the basis of graduation departments by ISCED classification, country and gender. The register data sets belonging to a total of 63,787 IT graduates were obtained from the Ministry of Interior, the Council of Higher Education and the Directorate-General of Population and Citizenship Affairs. The brain drain ratio of Turkish IT graduates was determined as %11.4 through the data of 7,284 non-return IT graduates in the year 2020. To our knowledge, this paper is the first register evidence-based study that sheds light on the brain drain of IT graduates from Türkiye.