Homeless charities have called for immediate government action to ease the rental crisis as prices reached a new record high during the first six months of the year.
The latest rental report by property website Daft.ie shows that supply is at an all-time low.
The average monthly rent nationwide in the second quarter was up 12% to €1,159.
Daft.ie said it is the fifth quarter in a row a new all-time high has been set.
In Dublin, the increase in rents in the year to June was over 12%.
It means rents in the capital are up €260 a month since their previous peak in 2008.
Elsewhere, rents rose by 6.8% in Cork, while in Galway the average rent is €732 – 10% higher than a year previously.
At €525, Leitrim is the county with the cheapest average monthly rent.
The property website also said that there were just under 3,000 properties available to rent nationwide on 1 August – the lowest number it has ever recorded.