Rents increased by 9% nationally last year.
The average rent stood at €1,415 in the final quarter.
Latest figures from the Residential Tenancies Board show in Donegal, rents increased 16.6% compared to 2020 to just over €760, the second lowest figure in the country.
The cost of rent in Dublin is just under €2,000.
While Leitrim remains the county with the cheapest rent, which now stands at €740 per month.
