Dún Laoghaire is the county town of Dún Laoghaire–Rathdown in Ireland.
It may also refer to: Borough of Dún Laoghaire, a former administrative unit around the town (abolished 1994) Dún Laoghaire (Dáil constituency), a parliamentary constituency (created 1977) Dún Laoghaire, a B-side to the Boomtown Rats single Like Clockwork (released 1978)