One of its main perks is the lack of visa requirement for UK residents.
MoveHub also points out the array of low-cost flights on offer between England and Ireland.
Making up the rest of the top 10 list was New Zealand, France, South Africa, Germany and Italy.
As of 2019, New Zealand was home to 272,436 British expats, meanwhile, France was home to 176,672.
South Africa, Germany and Italy also boast a huge population of Britons, with 131,310, 98,553 and 65,645 expats calling the nations home respectively.