Redfern Legal Centre chief executive officer Camilla Pandolfini said new bail laws introduced in NSW last year, and renewed this year, have made it harder for children to remain in the community while facing criminal charges.
"I'm shocked, it's a shocking statistic," she said.
"All of us should be concerned. Especially when the Australian government and the NSW government have committed to closing the gap.
And yet the over representation of First Nations children [in custody] is skyrocketing.