Nottinghamshire County Council is appealing for people to consider fostering older children.
It's also urging them to give a home to siblings, so they don't have to be separated.
Naomi Maher, 19, has been in foster care since the age of four. For nearly 12 years she's been living with the same foster family.
Naomi said she was happy to join her sister who'd already been fostered by the same family.
– Naomi Maher
Moving between different families you sought of lose a part of your identity and not sure where you belong, or who you belong with.
But when you have someone who is blood there with you, there's someone to share the experience with, someone you can talk to about what's going on and really someone you can identify with.
The County Council currently has 847 children in care. A figure which has doubled since 2008.
Councillor Kate Foale, who leads on the children's social care said there is a desperate need to find loving temporary and permanent homes for many youngsters.
– Councillor Kate Foale, Nottinghamshire County Council
We'd like more foster carers for older children and groups of siblings, perhaps brothers and sisters.
It's much easier for us to find families for babies and younger children but it's children and particularly 11 years old and older, that we need more foster parents for.