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.

Aerosol Misuse In Kildare Raises Fears Of Sudden Death Risk Among Teens
New Housing Plan Could See Kildare County Council Bidding Against First-Time Buyers
Naas Special School Delay - 12 Children Promised A Place Still Not In Class
Local Property Tax Deadline Extended To Wednesday
Lawless Rejects Claim He Let Apprenticeship Exam Leak Scandal "Fester"
Warnings Over Speeding In Kilcock School Zone But No Funding Available To Tackle The Issue Until 2026
Three Teenagers Arrested In Connection With Rioting At Citywest Hotel Last Month
New Leixlip Playground Features Sensory And Accessible Equipment