One in Four has experienced an increase in calls since allegations of sexual abuse against Irish language activist Dómhnall Ó Lubhlaí were highlighted in the media, according to the organisation’s director, Maeve Lewis.
The organisation provides counselling to victims of sexual abuse.
Following a recent complaint to the HSE and gardaí, Mr Ó Lubhlaí was under investigation for sexually abusing a 13-year-old boy who was attending an Irish language course in 1973.
Mr Ó Lubhlaí died on 20 March.
He was the founder of Irish language college Coláiste na bhFiann in 1968 and previously worked for Gael-Linn. He also taught in Coláiste Chilliain in Clondalkin and Clondalkin Vocational School.
In 1998, similar accusations of serious sexual assault against Mr Ó Lubhlaí were investigated by gardaí.
In 2002, he faced 56 charges of indecent assault, buggery and attempted buggery involving 11 victims, but the case never went ahead following a challenge by his legal team.
A number of his alleged victims have come forward in recent days and spoken of their experiences to Nuacht RTÉ.
The Rape Crisis Network has called on the Garda Commissioner to review the handling of all allegations about Mr Ó Lubhlaí.
HSE National Counselling Service Helpline: 1800-235234