Dún Laoghaire (, the older anglicisation of which, Dunleary, is also sometimes found) is a suburban seaside town in County Dublin, Ireland. It is about 12 km (7.5 miles) south of Dublin city centre. Dún Laoghaire is the county town of Dún Laoghaire–Rathdown county and formerly a major port of entry from Britain. From 1821 to 1920 it was named Kingstown.