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.
'Once-in-a-generation’ estate hits the market for a £16.5 million
A property described as a 'once-in-a-generation' estate on the Isle of Man has been put up for sale.
Event to celebrate women in farming
The Department for Environment, Food and Agriculture is inviting people to an event celebrating women in farming.
Engineers confirm source of gas smell in Ramsey
Reports of a gas smell in Ramsey yesterday prompted engineers to carry out emergency works.
MHK questions if Island phones will get national warning alert
Will Island residents receive a test national warning alarm on their phones?
Trainee officers take on 40 mile kayak mission
Student constables will tackle a 40-mile kayak challenge this weekend for charity.
Join the RNLI team and help keep our waters safe
Ever wanted to join the RNLI? Well now's your chance!
Ramsey fireworks cancelled
A planned fireworks display in the north of the Island has been cancelled this weekend due to bad weather.
Plans to promote Manx goods to be scrutinised by MHKs
Efforts to promote Manx produce will come under scrutiny next week in the House of Keys.
