Social anxiety disorder in adolescents is increasingly recognized as a common condition that may precede onset of other mental health problems. However, few measures are currently available to screen for adolescent social anxiety, and little is known about their psychometric characteristics in school-based samples. To this end, the present study was undertaken as a psychometric cross validation of the Social Anxiety Scale for Adolescents (SAS-A). Exploratory and Confirmatory Factor Analyses (CFA) supported the original 3-factor structure of the SAS-A but retained fewer items than in the original scale. The revised scales demonstrated good internal consistency as well as criterion and concurrent validity. Despite including fewer items, psychometric characteristics of the revised scales were equivalent to or stronger than those reported in previous studies of the measure. As such, the present study provides initial support for the utility of the revised SAS-A as a measure of social anxiety in adolescent school samples.