The Mindfulness in Couple Relationships Scale (MCRS) is a multidimensional assessment of mindfulness in the context of couple relationships. The 32-item MCRS was developed using Jon Kabat-Zinn’s description of mindful attitudes as a framework with adapted items from parenting mindfulness measures. Using racially and economically diverse samples, confirmatory factor analyses were conducted with a training sample and validated with a test sample of individuals in couple relationships. The MCRS demonstrated strong reliability and validity, with an eight-factor structure reflective of Kabat-Zinn’s mindful attitudes.