This article is on the influence of family on delinquency across gender. Three questions are investigated: does the exposure to family risk factors vary as a function of gender?, do the nature and strength of association between those factors and violent behaviours vary across gender?, and which factors best explain males’ and females’ violent behaviours? A sample of adjudicated adolescent males (n = 506) and females (n = 150) as well as a school-based sample of males (n = 204) and females (n = 198) of Montreal were compared. Analyses show that adjudicated females, even if they are more supervised, present a more problematic familial situation as compared to their male counterparts. For the school-based sample, the familial situation is very similar. Multivariate analyses confirm that supervision of both males and females is an important protection against violent behaviours in both samples. Nevertheless, weak ties seem to have a greater importance for boys’ delinquency in both sample, and parental deviance seems to be more relevant for adjudicated girls’ delinquency. The same proximal concepts should be use to explain violent behaviours of males and females, but research should investigated more seriously distant concepts. The interventions should focus on improving disciplinary practices and establishing stronger family ties.