Cyber bullying, the use of information and communication technologies to intentionally harm others, has become an important area of research. Studies had begun to investigate the extent of cyber bullying and personality characteristics of the victims. Less is known on the effect of online specific activities and the role of parental mediation on the likelihood of being bullied. This study attempts to fill this gap in the literature and conducts a secondary analysis of a representative sample of the U.S. youth population, the Teens and Parents survey conducted by the Pew and American Life project (n=935). The results indicate that the risk of youth being bullied is higher for adolescents that have an active profile in social networking sites and participate in chat rooms but playing games online not. There are gender differences in risk factors. Few parental mediation techniques are protective but most not. The results indicate the need for more parental participation to reduce the youth risks that derive from Internet use for interpersonal communication.