Is adoption permitted in Islam, and how does it differ from adoption in Western law?

Islam strongly encourages caring for parentless children, but it draws a sharp legal line that Western-style adoption does not: an adopted child never becomes the legal equivalent of a biological child in lineage, inheritance, or mahram status. This followed the Quran correcting a pre-Islamic Arab custom of treating adopted sons as full sons, instructing instead that adopted children keep their birth father's name, "for it is more just in the sight of Allah" (33:4-5), and illustrating the principle through the Prophet's own household - he married Zaynab after his adopted son Zayd divorced her, something unthinkable regarding a biological son's ex-wife (33:37). Practically, this means an adopted child does not automatically inherit from adoptive parents, though a bequest of up to one-third of the estate is permitted, and once past puberty is not treated as an unrelated mahram within the adoptive family - a girl adopted into a home, for example, would still observe hijab before her adoptive father unless nursed by the mother in infancy. Muslims are instead encouraged to pursue kafalah (sponsorship), offering full love and upbringing while preserving these legal distinctions.

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