Car-Rent.com compares the prices of well-known car rental companies in Ireland, including the following location: Dublin Airport
Dublin Airport (in Irish: Aerfort Bhaile Átha Cliath) is the airport of the Irish capital city Dublin. It is the largest and busiest airport in Ireland. It is also only one of two airports outside of North America where passengers can already fill out their paperwork for American Customs. (The other airport where this is possible is Shannon, also in Ireland.)
Dublin Airport is designated by the aviation industry with the IATA code DUB and the ICAO code is EIDW. With regards to the Wikipedia article over Dublin Airport, the airport has three take-off and landing runways.
At the time of writing this, there are six car rental companies who have offices situated at Dublin Airport: Avis, Budget, Europcar, Hertz, Irish Car Rentals and National.
The airport's official website can be found via the following address link: Dublin Airport