The refugee group, A Just Australia, says the number of children detained in Nauru as part of the Australia's policy of processing asylum seekers offshore has decreased by 10 and is down to 83.
The group's director says the fall is a result of resettlement in New Zealand or them turning 18 years.
Howard Glenn says Nauru remains the Australian government's preferred detention centre for children, with 53 per cent of all known detained children.
Mr Glenn says children in Nauru, and their families, should be brought to Australia and given bridging visas to live in supervised community accommodation while their future is reassessed.
