At least 40 new foster carers are needed to look after children in Sheffield this year.
The council is appealing for more families to come forward to help provide secure and loving homes for young people in care.
There are 289 foster families on the current database, with 280 children in homes.
But the council says it needs around 40 more families to agree to take in young people – particularly teenagers and siblings – in the next 12 months to address a shortage.
Coun Jackie Drayton, council cabinet member for children, young people and families, said: “Sadly there is a real shortage of foster carers nationwide, and Sheffield is no different.
“In particular we really need people to come forward who can foster older children like teenagers, or more than one child to keep brothers and sisters together.
“Sad though it is, there are lots of children who desperately need help to have a roof over their heads and the potential to grow up in a happy, loving home – something which they may not ever have had.
“That is why we would urge as many people as possible to come forward and become foster carers. You could make the difference.
“It can be extremely rewarding.
“It is often challenging, but there are people around to help and more importantly you could make a real difference in the lives of children and young people.”
n Visit the website www.sheffield.gov.uk/fostering or Facebook page www.facebook.com/sheffieldfostering for details.