Since the latter part of the 20th century, dramatic changes have taken place to the structure of the family such that the traditional nuclear family headed by a heterosexual married couple is now in the minority. This chapter begins with a description of these changes and some of the key factors involved. The consequences of different family contexts for parent–child relationships and children's socioemotional development are then examined. These include single‐parent families, stepparent families, cohabiting parent families, families created through assisted reproductive technologies, and families headed by same‐sex parents. The specific issues and concerns raised by each family type are outlined, followed by a discussion of key empirical findings regarding parenting and child adjustment. The chapter ends by drawing on research relating to children in these different family forms to examine the relative importance of family structure and family processes for children's socioemotional development. The implications for policy and practice, and directions for future research, are also discussed.