Plans for a new prison in Caenarfon were scrapped last year and there have been no announcments of any new proposed sites since.
Mr Llwyd, who’s a member of the House of Commons Justic Committee, requested the timing of an announcement of prospective sites in north Wales for a prison.
The coalition Government’s said there would be re-evaluation of prison capacity.
Mr Llwyd said: “It is very worrying that more than a year after the cancellation of the north Wales prison in Caernarfon, the government in London still cannot confirm whether or not there will be a prison built in north Wales.
“Our campaign for a prison is separate from the issue of over-crowded prisons around the UK.
“North Wales is a large geographical area which currently has no prison facility, meaning that we have to send prisoners to the north-west of England, far away from their families and communities.
“That lessens their likelihood of successfully re-integrating into society and means that they are more likely to commit crimes in future.
“North Wales needs a medium-sized prison reflective of the area’s population and crime rates and there has been a long-running campaign in favour of this prison. A large ‘titan’ prison would not solve anything as it would simply mean moving prisoners from England across the border and for them to encounter the same problems.”
Mr Llwyd is hopeful the Prisons Minister, Crispin Blunt, will listen to his concerns and announce plans for a prison sooner rather than later
He added: “I’m worried that the UK government is using delaying tactics yet again and that plans for its creation are slowly slipping away.
“I hope that the Prisons Minister will consider this position sensibly and show willing to solve this issue in north Wales.”