The purpose of this study is to find out the demographic characteristics and cognitive styles of student teachers in various subject areas in Turkey. Under this general purpose, the following research questions were used to conduct the study: (1) Does the gender of the student teacher influence cognitive style?; (2) Does the educational level of the student teacher's mother influence cognitive style?; (3) Does the educational level of the student teacher's father influence cognitive style?; (4) Does the high school of the student teacher influence cognitive style?; (5) Does the field of study influence cognitive style?; and (6) Does family income influence cognitive style? The sample for this study (N = 276) consisted of student teachers within Canakkale Onsekiz Mart University's Faculty of Education during the 2005-2006 academic year. Findings of this study suggest that cognitive styles cannot be labeled good and bad because each style has unique features. Knowing individual differences can help teachers understand the needs of different students. (Contains 2 tables.)