Resumen: Scientific literature has shown contextual factors that predict youth development, and family variables are the most important ones. In this study, we propose a model that explains the relation between family variables (relationship with parents and family activities) and Personal Positive Youth Development (assessed through Life satisfaction, Interiority, and Self-control), across different cultures. We recruited 2867 adolescents aged 12–18 years (52% female) from three countries: Spain, Mexico, and Peru. They completed an anonymous questionnaire. We run exploratory and confirmatory factor analyses, and structural equation modelling, testing for invariance across countries and sexes. In all subsamples, positive family relationships were associated with adolescents'' Life Satisfaction. In addition, time invested on family activities was associated with Interiority and with Self-control. However, some differences across cultures and sex were found in the specific associations. Theoretical and practical implications are discussed regarding how to improve adolescent development through family life. Idioma: Inglés DOI: 10.1002/jcop.22689 Año: 2022 Publicado en: Journal of Community Psychology 50, 2 (2022), 896-915 ISSN: 0090-4392 Factor impacto JCR: 2.3 (2022) Categ. JCR: SOCIAL WORK rank: 13 / 44 = 0.295 (2022) - Q2 - T1 Categ. JCR: PSYCHOLOGY, MULTIDISCIPLINARY rank: 75 / 147 = 0.51 (2022) - Q3 - T2 Categ. JCR: PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH rank: 110 / 180 = 0.611 (2022) - Q3 - T2 Factor impacto CITESCORE: 3.5 - Psychology (Q2)