The purpose of this study was to investigate the relationship between sociometric popularity (like-most nomination and like-least nomination) and perceived popularity (most-popular nomination and least-popular nomination ) and to examine the relationships between adolescent aggression (overt, relational, and not prosocial behavior) and each of the popularities. The 377 subjects were selected from first and second graders of middle and high schools. The results of this study were as follows: 1) Sociometric popularity is significantly correlated with least-popular nomination, but not with most-popular nomination. 2) Adolescent aggression is negatively correlated with socimetric popularity, but positively associated with perceived popularity. 3) Sociometric popularity is negatively associated with aggression for only girls, but perceived popularity is positively associated with aggression for both boys and girls. 4) Sociometric popularity is negatively associated with aggression for only middle school students, but perceived popularity is positively associated with aggression for both middle and high students.