Few studies have considered how religion moderates the ways gender ideology influences heterosexual relationship outcomes. Drawing on a national random sample of American adults who report being married or living as married, we focus on the extent to which religious commitment moderates the link between gender ideology and reported relationship satisfaction, and whether this moderating effect varies across gender. We find that gender traditionalism is negatively associated with relationship satisfaction; however, interaction effects reveal that religious commitment moderates the effects of gender ideology such that the negative effects of gender traditionalism on relationship satisfaction only apply to people who are less religious. Gender traditionalism, by contrast, is not negatively related to relationship satisfaction for the highly religious. Splitting the sample by gender reveals that this moderating relationship is significant for women only. Thus, while gender traditionalism is negatively related to relationship satisfaction in the main, this effect is contingent on both gender and religious commitment. Religious commitment appears to mitigate negative effects of gender traditionalism on relationship outcomes, particularly for American women.