Portmarnock

Portmarnock
Irish: Port Mearnóg
Suburb (village core)
Portmarnock, Dublin
Portmarnock
Location in Ireland
Coordinates: 53°25′18″N 6°08′14″W / 53.4217°N 6.1372°W / 53.4217; -6.1372
CountryIreland
ProvinceLeinster
CountyDublin
Local government areaFingal
Elevation
3 m (10 ft)
Population
 (2022)
10,750
Eircode routing key
D13

Portmarnock (Irish: Port Mearnóg) is a coastal town in County Dublin, Ireland, north of the city of Dublin, with significant beaches, a modest commercial core and inland residential estates, and two golf courses, including one of Ireland's best-known golf clubs. As of 2022, the population was 10,750, an increase of 13.5% on the 2016 census figure of 9,466.

Portmarnock is also a civil parish in the ancient barony of Coolock. It is in the local government area of Fingal.