Rents in Co Mayo are now 2.4% lower than a year ago, according to the latest report from property website Daft.ie
The average listed rent in Mayo is now €744 per month.
This compares with the national average monthly rent of €1,419 - up just over 1% on this time last year.
In the third quarter of this year, rents were largely stable in Dublin, but outside Dublin rents rose by almost 3% between June and September.
Monthly rents in Galway and Cork are up 5% year on year, with Galway city rents now averaging €1,363.