A three-bed semi-detached house is up 10.3 per cent in Donegal town to €470 per month.
A similar home in Letterkenny rose by 12 per cent to €530 per month.
The rise is part of a national pattern showing provincial town rent rises jumping across the country.
The Residential Tenancies Board (RTB) record the actual rents paid as opposed to those advertised.
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