The internal structure of the Warwick-Edinburgh Mental Wellbeing Scale was evaluated using confirmatory factor analysis for a sample of youth living in Michoacán, Mexico. While the chi-square test of model fit suggested misfit to the data, the alternative fit indices and standardized factor loadings supported the conclusion that the items are adequate and reliable indicators of a single underlying latent factor. The utilization of this strengths-based mental health instrument could help circumvent some of the negativity and stigma inherent in traditional mental health assessments.