Council leaders have urged more adoptive parents to take on older children, saying: "It isn't just babies who need a loving a home".
Social care lead at Nottinghamshire County Council, Councillor Kate Foale, said the proportion of children being adopted drops from one in three at the age of four and below, to just one in 15 once they turn five.
She also urged people to consider taking on siblings, to prevent families from being split up.
It isn't just babies who need a permanent loving home, or a temporary one for that matter.
One of our biggest challenges is also being able to keep brothers and sisters together when they're placed.
We're asking those considering adoption or fostering to think about whether they have the space and energy to adopt more than one child so that siblings don't have to be separated.
– Councillor Kate Foale, Nottinghamshire County Council
Many of those children waiting to be matched are boys aged five to eight and many of these are part of sibling groups of two or three.
And in spite of our tireless efforts to find permanent homes for these types of children, the odds of placing them are sadly low and become ever-reduced as the children grow older.