Her sister, Kathleen Bergin, says the family will never stop seeking answers, and is urging anyone with any information to come forward.
A remembrance service is being held today to mark 30 years since the disappearance of JoJo Dullard.
Gardai have renewed their appeal for information and say her disappearance is the subject of a sustained investigation.
In 1995, the 21-year-old never returned home after hitching a lift from Moone back to Callan.
Speaking to Kfm this week, JoJo's sister Kathleen Bergin appealed for anyone, even with the smallest amount of information, to come forward.
Parish priest of St Canice’s Church in Kilkenny, Fr Willie Purcell, is leading a remembrance service later today in the city.

Kfm Obituary Notices
Four Kildare schools help create hedgehog-friendly habitats
Staff Turnover Continues To Challenge Kildare Childcare Sector
Derelict Housing At Curragh Camp Remains Unaddressed
Gardaí Seize Illegal E-Scooter Driven By 14-Year-Old In Naas
Driving Test Centre For Leixlip & Celbridge Area Moves A Step Closer
Councillor Believes Bollards In Naas Are Causing Issues For Patrol Cars Pursuing Drug Dealers