1,054 children were supported by child sex abuse charity CARI last year.
In its annual report, it says it dealt with 807 calls to its helpline concerning sexual assault, rape and sexualised behaviour.
A third of the calls related to children under 10 years of age.
It also carried out 2,000 therapy sessions with children and parents in 2018. The organisation also supported 90 children through criminal trials.
But CARI executive director Eve Farrelly says a lack of resources means 83 children in need of help sit on a waiting list;
"It's our experience and our belief that timely and right intervention for children with this particular type of experience is paramount."
She went on to say that; "children who can get the timely and right intervention can go on to develop capacity to manager their life issues, they can recover from their trauma."
