This study examined a typology of adaptive and maladaptive behaviors of 2,552 ethnically diverse early adolescents who attended sixth grade in public schools and lived in disadvantaged communities. Behavioral adjustment of adolescents was measured by teacher ratings using the Behavior Assessment System for Children (BASC). Although typologies of children based on the BASC have been available in the literature for the past decade, little research exists on typologies of adolescents using the same instrument. The present study extended into early adolescence previous classification works focusing on childhood. A series of cluster analyses supported a seven-cluster solution: well-adapted, average, adaptive skills deficits, internalizing problems, mildly disruptive, disruptive behavior problems, and severe problems. Results appear similar to prior investigations with unique features reflecting the high-risk characteristics of the current sample. Implications of this research are discussed with regard to prevention and intervention efforts implemented within the schools. (Contains 2 tables.)