The importance of selection of profession and university cannot be overemphasized in ones life. It is one of the most important decision stages of a student. This stage must be carefully managed since it determines profession of students in the future. Failure to do so can bring many negative effects. Many undergraduate students state that they have not properly managed the selection of the departments they are part of. In the case of failure, students have shown this as one of the main reasons. The factors influencing one's career choice has always been a controversial issue. In general poor presentation of universities and departments, misguidance of college candidates during high school years, inefficiently informed parents can be listed as main reasons for mispreference of students' department selection (Betz, 2000; Henderson, 2000; Csikszentmihalyi, 2003). There are many factors that are important in preference of mathematics department as in the all profession groups. This paper will critically demonstrate the main ones. In this study, factors which have effect on department preferences of students at Mathematics Department of Kocaeli University were evaluated and reasons and manner of students' preferences were researched. (C) 2014 The Authors. Published by Elsevier Ltd.