The Department of Home Affairs says the prison has almost 15 per cent more inmates than it was designed for.
A Freedom of Information request asked how many prisoners the Jurby facility was designed to hold, and how many people were currently incarcerated there.
In its response, the department said the official capacity was 141 - and on April 7 there were 159 inmates.
It added there were 26 cabins on top of the permanent accommodation, all of which were being used.
DOI planning Douglas horse tram extension
The Douglas horse tram tracks could soon run to the Sea Terminal, according to Infrastructure Minister Michelle Haywood.
Sandy the cat recovering after public raise thousands for surgery
A cat who underwent surgery after the public raised thousands of pounds to help him is making a steady recovery, according to the ManxSPCA.
Plane talkers needed!
Could you help show visitors around the Island's latest tourist attraction?
Castletown paint vandals target bus stop, cars and roads
Bus Vannin says it’s reported vandalism in Castletown to police after someone threw paint over a bus stop.
Immigrant health surcharge 'could impact hospitality and healthcare sectors'
Treasury Minister Alex Allinson says bringing in a health surcharge for new Island residents has to be balanced against the need to bring workers here.
Chance to meet Palestinian journalist behind award-winning Gaza film
A Palestinian filmmaker will be on the Island this summer to present his award-winning documentary about Gaza.
Manx Utitilies companies facing competition investigation
The Island's telecom regulator says it's investigating whether two Manx Utilities subsidiaries have been acting anti-competitively.
Beach water quality tests start next month
Tests on water quality on the Island's beaches will get underway in around two weeks' time.
