Yes, widely. You can run daily life in Ireland in English, and only official paperwork reliably pushes back. Ireland scores 98/100 for English in this model, the highest of the 27 EU countries, and the main language is English. These are MoveMap's rough, illustrative estimates to help you get oriented, not official statistics. Always confirm the specifics with official sources before you act.
Getting by day to day
English is very widely spoken. You can handle daily life in the cities in English, though some official paperwork is still in the local language. Younger people, hospitality and international workplaces are where English is strongest; older residents and rural areas, less so.
At work and with paperwork
Ireland has a sizeable international community, so English-speaking services, groups and workplaces are easy to find. Either way, official documents, tax forms and healthcare admin are usually in English, and a local friend or translator helps early on.
Learning the local language
The main language is English, which is one of the more approachable languages for English speakers to start with. Even a basic level opens doors socially and at the shops, and it is often expected on the road to permanent residence or citizenship.
How Ireland compares
Among the 27 EU countries, Ireland ranks the 1st most English-friendly in this model.