‘Despite the rapid growth of the non-White, foreign-born population and the number of mixed couples, intermarriage remains to be an underexplored field of research in Sweden. The scarce literature on intermarriage and well-being has been focused on specific negative consequences of having poor mental health conditions. This chapter provides an overview of the state of the art of the literature on intermarriage and mental health in Sweden. It discusses how the societal-historical context and, more specifically, attitudes towards intermarriage and differences in cultural norms might affect the well-being of people who marry exogamously. We also report on the responses to nine questions from the self-administered Patient Health Questionnaire (PHQ-9) that we asked among the native-born population as part of a survey study on refugee-local residents’ relationships conducted in Stockholm, Gothenburg, and Malmö. Our findings do not support previous studies associating intermarriage with poorer mental health for native-born Swedes, while it shows a clear difference in the mental health of married versus single people. The well-being of intermarried couples in Sweden should be further explored not simply as subjective experiences but as the experiences of living together, acceptance of diversity, and social cohesion of increasingly diverse societies.