How can middle school counselors identify bullies? This study compared two methods of identifying bullies in a sample of 386 middle school students. A peer nomination survey identified many more bullies than did student self-report. Moreover, self-reported and peer nominated bullies differed in their types of bullying behaviors, level of general self-concept, attitudes toward aggression, and disciplinary infractions. Overall, this study raises concern about reliance on student self-report and supports the use of peer nomination as a means of identifying school bullies. These findings have implications for school counselors in undertaking efforts to reduce school bullying. (Contains 1 footnote and 1 chart.)