Foster care refers in practice to the placement of a child or young person away from their birth parents or usual carers with an approved foster carer, on either a short‑term, long‑term, emergency or kinship basis, under the supervision of the relevant child protection authority. It is a core mechanism for safeguarding children who cannot safely remain at home, while maintaining, where appropriate, family contact and the prospect of rehabilitation or permanence elsewhere.In England and Wales, “foster parent” and related concepts are defined and regulated mainly by the Children Act 1989 and associated regulations. Scotland uses similar terminology under the Children (Scotland) Act 1995 and the Children’s Hearings system, while Northern Ireland relies principally on the Children (Northern Ireland) Order 1995. Ireland governs foster care under the Child Care Act 1991 and Child and Family Agency Act 2013. Across all jurisdictions the term is broadly consistent.Key legal issues include local authority or agency approval of carers, care planning, parental responsibility, reviews of placements, safeguarding standards, and pathways to adoption or other permanence. Foster care is central to public law children proceedings, care orders, emergency protection, and voluntary accommodation.