Out of all the popular cities in Ireland, Cork is the cheapest city to hire a car in at just $20/day. Renting a car in Cork is 76% cheaper than renting one in Galway where the per day rate is around $78. Other fairly inexpensive cities in Ireland to get a car hire in are: Dublin ($22/day), Shannon ($40/day), and Kilkenny ($69/day). While these cities typically have cheaper prices than the rest of the country, travellers looking to hire a car in Dublin should expect to spend around $22/day on their transportation. The most popular city to rent a car in Ireland is Dublin.