This research aims to study the association between family functioning and social media addiction in students at the secondary level of a public educational institution in the eastern part of Lima. It is non-experimental, cross-cutting and correlal-range design. The sample consists of 603 students, aged between 12 and 18. The results according to the research sample analyzed reveal that there is a highly significant association between family functioning and social media addiction. Also, in relation to the dimensions of family functioning, a highly significant association was found between family cohesion and social media addiction (X2 = 33, 236; p =.,000). Similarly, a highly significant association was found between family adaptability and social media addiction (X2 = 40, 318; p =.,000). It should be noted that in this research adolescents with families with a high level of cohesion and adaptability showed a lower risk of social media addiction.