At least 750 foster families are needed across Yorkshire and the Humber, according to new figures.
The Fostering Network said new foster families are needed to replace the 12 per cent who leave the service each year.
Homes for teenagers, children with disabilities and sibling groups are needed particularly.
Nationally around 7,000 new homes are needed.
Robert Tapsfield, chief executive of the Fostering Network, said: “Children and young people come into care for a wide range of reasons, but all come needing professional, dedicated and compassionate support. Foster carers are remarkable people who open their homes to some of society’s most vulnerable and disadvantaged children and young people.
“We urgently need people who believe they have the right skills and qualities to foster to come forward and make a long lasting positive difference to the life of a child. In particular, foster carers are needed to provide homes for teenagers and children with disabilities, and to help sibling groups stay together.”
To find out more about becoming a foster carer, visit couldyoufoster.org.uk for details of local points of contact.