Social work has long been involved in child foster care. Though its initial involvement de-emphasized the importance of infant–caregiver attachment, Bowlby’s theory of attachment is particularly relevant for child-welfare practice. This entry chronicles the history of child foster care and describes the evolution of legislation most pertinent for the provision of foster care. The characteristics of children in foster care since 2000 and the dynamic flow of children entering and exiting care are described. A brief account of foster care services and future trends in the field are highlighted.