This research has been conducted with the aim of determining social integration levels of high school students in the South eastern Anatolia Region and whether thelevels of social integration of them have been differentiated in terms of various variables. In this study, the descriptive scanning model has been used; it has been aimed to describe the current situation and generalize it to the universe. The research data has been obtained using the Social Integration Scale (SIC) which was developed by the researchers doing the validity and reliability analysis and was in five-point Likert-type consisting of seven dimensions. 1106 high school students, in the springterm of 2008-2009 academic year, who were studying at variety of highschools located in the eight provinces in the South eastern Anatolia Region participated in to the research. As a result of the research, it has been understood that the general social integration levels of highschool students in the Southeastern Anatolia Region are high and they have the perception of a high level integration in the dimensions of normative-moral integration and national integration. However, it has been found to be significant that high school students show low participation in the dimension of educationalintegration. Research findings have revealed that high school students social integration level does not differentiate according to their sex, the province of highschool, type of high school and the situations of taking disciplinary action; where as, it differentiates according to variables such as their class level, success in school, gettingpre-school education, tendency of dropping out of school, family income, mother education level, mothertongue. In this research, one of the most important findings is that social integration levels of those who use another mother tongue besides the official language Turkish are relatively high.