Social interaction among different ethnic groups has been a major focus of study in the world in recent decades. The population of Iran is composed of variety of ethnic groups (such as linguistic, religious and cultural) and for this study the people of different backgrounds are considered. This article will discuss the types of social interaction among different ethnic groups and the role of youth in Iran. This research was carried out in 20 high schools in west Azarbaijan. The nature of social interaction in this study is classified according to several factors such as ethnicity, gender, and academic achievements. The students were given a set of questionnaire and findings were analyzed quantitatively and the results showed that students prefer to be mixed with others in their own ethnic group.