Understanding Family Support provides a definition of family support and a clear perspective on the role that it has in promoting the welfare of children and their families. Family support is a concept that has been used in a range of ways to describe various aspects of child welfare policy and practice. The authors argue that this weakens family support as an overarching child welfare paradigm. They present a unifying definition of family support along with ten principles and a series of reflective practice questions applicable to: legislation and policy; organisation, management and planning; direct work with children and families; and research and evaluation. This is an important resource for any professional engaged in policy development, service design, delivering or evaluation of family support, including social workers, residential care staff, community development workers, teachers, community police, human services managers, evaluators and policy makers.