Individual and romantic partner religiosity are positively associated with marital quality. However, many studies focus on married couples, rather than examining dating relationships, and rely on single-item measures of religiosity. More importantly, few studies have examined the importance of relationship religiosity in the context of dating, despite the theoretical importance of this construct. Relationship religiosity is defined as participating in and discussing religiosity and spirituality with a current romantic partner. The goal of this study is to test relationship religiosity as a mediator between individual and partner religiosity for relationship quality of dating relationships using stringent measures of centrality of religiosity. Data for this study comes from 119 participants who were in dating relationships (74.8% female; mean age: 23.2 years). Participants completed a survey regarding their religiosity, their partners' religiosity, the religiosity of their relationships, and the quality of their dating relationships. Mediation analyses via linear regression showed that relationship religiosity fully mediated the relationship between individual religiosity and relationship satisfaction and fully mediated the relationship between partner religiosity and relationship satisfaction. However, relationship religiosity was not associated with commitment. Results from the study emphasize the importance of dyadic religious activities for dating couples. Further implications will be discussed.