Scholarly work and public commentary point to the persistence of masculinity models characterized by a sense of entitlement, the exertion of dominance, and the justification of abusive behaviors. While there is abundant theoretical work on men and masculinities, fewer empirical studies have examined how young men develop their masculine ideals. In this study, we theorize the role of fathers’ adherence to masculinity ideology in influencing the development of young men’s masculine ideals. We then provide novel empirical evidence on intergenerational congruence between fathers’ and sons’ masculinities using unique data from an Australian national probability survey. Our results reveal moderate, positive associations between fathers’ and sons’ adherence to masculinity ideology. This pattern holds for an overall measure of masculinity, as well as for each of its subscales. Fathers’ religiosity amplified the magnitude of the intergenerational correlation. These findings suggest that interventions aimed at encouraging the development of healthy masculinities amongst young men should engage their paternal figures.