The Young Schema Questionnaire (YSQ; Young, 1994) is a widely used instrument to assess early maladaptive schemas in adults and older adolescents. Despite its widespread use, no norm data are available, making it difficult to evaluate when an individual’s YSQ score can be considered as elevated or high. Such norms can be useful for screening purposes such as to identify those at risk for psychopathology and providing early and appropriate interventions. The aim of our study was to norm the five schema domains of the Dutch adolescent version of the Young Schema Questionnaire (YSQ-A: Van Vlierberghe et al., 2004). In addition to providing norm data for clinical practice, we also show the process of obtaining reliable and valid norm data with state-of-the-art regression analysis which does not necessarily require splitting the norm sample into subgroup by sex or age, yet does take these variables into account in obtaining norms.