The present cross-sectional study tested a portion of the tripartite model of familial impacts on self-regulation (Morris et al., 2007) in reference to social competence during early adulthood. N = 302 young adults ages 18 to 24 years (64.9% female; 80.4% European American; 10% Hispanic) were recruited through Mechanical Turk (n = 254) and the local community (n = 48). All participants responded to anonymous online questionnaires about self-regulation, parenting practices, and interpersonal competence with same-sex peers and romantic partners. High parental acceptance and low psychological control were linked to high levels of self-regulation. High social competence in both relationship types was associated with high acceptance and self-regulation; lifetime romantic relationship experience also covaried with high romantic competence. Findings suggest that the tripartite model is applicable to interpersonal competence in emerging adulthood. (C) 2017 Elsevier Inc. All rights reserved.