Masculinity ideology is the endorsement of a set of culturally based male role norms that influences gender-related attitudes, beliefs, and behaviors. However, masculinity research has been criticized for not being inclusive enough of different cultures. This study explored the cultural and relational components of masculinity by comparing 564 Turkish, Norwegian, and U.S. men’s endorsement of masculinity ideology and examining the associations between masculinity ideology and interpersonal attitudes and behavioral competencies with romantic partners and work colleagues separately for the three groups of men. Norwegian men had significantly lower scores on a measure of masculinity ideology than both Turkish and U.S. men. Canonical correlation analyses revealed that all three groups of men had significant associations between male role norms and interpersonal relationship variables, but the patterns of association differed by country. Generally, endorsement of traditional male role norms was associated with poorer interpersonal competencies for men in all three countries, although the associations were much stronger for the Norwegian sample. Implications, limitations, and directions for future research are discussed.