The affective involvement of parents in the socialization of their children is fundamental for the proper psychological and emotional adjustment of adolescents, although we know that it is difficult to study. In this research, the relationship between parenting style and hostility was analysed in Spanish adolescents. Five-hundred and thirty-six adolescents participated in this study (53.7% males and 46.3% females), between the ages of 12 and 18 (M = 15.76, SD = 1.43), enrolled in 4 compulsory Secondary Education centers of the Castellon province. Family socialization was evaluated through the parental styles: authoritative, indulgent, authoritarian and negligent, and hostility, through the Cook–Medley Hostility Scale Criteria assessment. A multivariate analysis of variance (MANOVA) was carried out with multiple regression analysis. The results showed that hostility and compound hostility are higher in adolescents from authoritarian and authoritative families than in adolescents from indulgent families. It was also observed that the Mother’s Strictness/Imposition had the greatest effect on hostility, as well as a low acceptance/involvement of the father. Regarding parental styles, it was observed that mother’s deprivation, physical coercion, and mother’s verbal coercion were the greatest predictors of hostility. No differences were observed depending on the gender.