According to Barnardos children's charity, 8,750 new foster families will be needed across the UK in 2012 to 2013.
Currently 7,000 children are in need of adoption, with a white child three times more likely to be adopted than a black child, they said.
- 7,100 in England
- 1,000 in Scotland
- 550 in Wales
- 100 in Northern Ireland
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Britain was warned by the government's immigration adviser it was becoming more divided as diversity increases.
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The UK is facing "sharper disparities" in inequality despite wider global growth, but monetary policy is not to blame, Mark Carney has said.