Workers seeking to take an unfair dismissals case at the Employment Appeals Tribunal currently have to wait around a year and a half for a hearing.
In the latest figures issued to RTÉ news, the Department of Jobs, Enterprise and Innovation confirmed that the average waiting period in Dublin is 75 weeks.
It is 83 weeks in the rest of the country.
In addition, there are significant delays in issuing determinations - with the longest delay involving a case where a ruling post-hearing has been awaited for 104 weeks.
At the beginning of this month, there were just over 5,000 cases waiting to be listed for hearing.
However, the Department of Jobs Enterprise and Innovation noted that the EAT has increased the number of cases disposed of in recent years - with an additional 13% of cases handled in 2012.
The department stressed that the EAT is independent in exercising its quasi-judicial function and that the minister has no direct involvement in its day to day operations.
The department said the tribunal aims to issue 80% of determinations within ten weeks of a hearing taking place.
It could not supply figures for the exact number of cases which have been heard and where determinations are still awaited.
