Dún Laoghaire is connected to central Dublin by the DART suburban railway, frequent bus service, and has a ferry connection to Holyhead in Anglesey, Wales.
The Dublin to Kingstown railway, constructed in 1834, was the first ever railway in Ireland. Beside the railway station is the terminus of the 46A (Dún Laoghaire — City Centre (An Lár)), the most frequent and heavily used bus route in Dublin.
A number of years ago, George's Street underwent pedestrianisation, with the buses which used to run along this route (7,7A,8) being now re-routed along the sea front up to Marine Road.