Objective: Despite the high prevalence of adolescents’ pornography use and increasing societal concerns about it, the examination of problematic pornography use (PPU) among this population is still scarce, potentially due to the lack of well-validated, reliable measures. The aims of the present study were to validate a short, theory-based measure of PPU in a diverse sample of adolescents and identify a potentially at-risk problematic pornography user group. Method: We used a sample of 802 adolescents (35% girls; 14% sexual minority; Mage = 15.4 years, SD = 0.6) who reported lifetime pornography use, collected as part of an ongoing longitudinal study on adolescents’ sexual health. To examine the psychometric properties of the short, six-item version of the Problematic Pornography Consumption Scale for adolescents (PPCS-6-A), we conducted confirmatory factor analysis, gender and sexual orientation measurement invariance testing, and assessed theoretically relevant correlates (e.g., masturbation frequency). We conducted latent profile analysis to identify adolescents at risk of PPU. Results: The PPCS-6-A demonstrated strong psychometric properties in terms of factor structure, measurement invariance (i.e., boys vs. girls, and heterosexual vs. sexual minority adolescents), and reliability, and correlated reasonably with the assessed variables. Ten percent of participants were identified as being at-risk of PPU. Conclusions: The PPCS-6-A can be considered a short, reliable, and valid scale to assess PPU in adolescents, and may distinguish between low-risk and at-risk problematic users. Its use in future studies could lead to a better understanding of the prevalence and characteristics of adolescents’ PPU. (PsycInfo Database Record (c) 2021 APA, all rights reserved) Impact Statement This study demonstrated that the short version of the Problematic Pornography Consumption Scale is a valid and reliable measure of problematic pornography use in adolescents, including boys, girls, heterosexual, and sexual minority adolescents. Ten percent of participants were identified as potentially at-risk problematic pornography users, indicating that a small but still significant group of adolescents may experience that their pornography use is uncontrollable and results in significant distress and functional impairment in their lives. (PsycInfo Database Record (c) 2021 APA, all rights reserved)