Dublin has accounted for almost 40% of all bed bugs callouts in Ireland so far this year, according to Rentokil.
The next four highest counties for callouts are Cork (21%), Galway (10%), Kerry (8%) and Monaghan (5%).
Rentokil is warning Irish holidaymakers to be on the lookout for the presence of bed bugs as they return from holidays.
Richard Faulkner, advanced technical field consultant for Rentokil, said: “Bed bugs lay eggs and multiply at alarming rates, and the size of these pests can make them difficult to spot.
“As the summer comes to an end and people return from staycations across the country, this unfortunately increases the risk of returning home with unwanted guests.”