The Intimate Relationships Across Cultures Study was conducted in collaboration with 40 colleagues around the world. The 8746 participants included students and older nonstudents from nine cultural regions, and eight relationship types defined by women or men in opposite-sex or same-sex relationships, unmarried or married. On average, married partners had greater life satisfaction and happiness, and less depression, in comparison with singles, among both women and men. But some singles had high well-being and some married partners had low well-being, with singles being more at risk of low well-being. While married partners and dating partners often rated goals relevant to a family as more important, singles did not rate career and leisure as more important than married or dating partners.