Abstract: This study aims to determine whether gender, family relationships and playing a sport create a difference in peer relations of adolescents. It was carried out with 173 adolescents studying at the first and second grades of middle socio-economic level high schools in downtown Ankara. Data about the adolescents and their families was collected with the help of the General Information Form developed by the researchers. Data about peer relations was collected using the Peer Relations Scale developed and tested for validity and reliability. The data obtained was then evaluated using t-test and one-way ANOVA. The results suggested that gender, family relationships and playing a sport had a significant effect on peer reelationships (p< .001, p< .01, p< .05).