This study examines the the prevalence of trauma experiences and traumatic stress in a diverse group of Asian American middle school students from a large urban school district. Descriptive statistics document the mean number of self-reported trauma experiences and posttraumatic stress subscale scores and how these rates differ by students' gender and Asian ethnic subgroups (including Chinese, Filipino, Japanese, Korean, Samoan, Southeast Asian, and Other). Furthermore, we assess the degree to which one or more traumatic events is associated with students' self-reported symptoms of severe traumatic stress and the types of traumatic events that are the most powerful predictors of elevated stress. These in-depth findings underscore the need for routine, school-based screening to identify and bring culturally-competent, trauma-informed support and interventions to Asian American middle school students experiencing traumatic stress. [This paper was published in "Asian American Journal of Psychology" v8 p209-223 2017.]