Lucan is an outer suburb of Dublin, Ireland, located 12 km west of Dublin city centre, on the River Liffey. It is near the Strawberry Beds and Lucan Weir, and at the confluence of the River Griffeen. It is mostly in the local government area of South Dublin, with the exception of the North Lucan areas of Laraghcon, Coldblow and Saint Catherine's Park, which are in Fingal. Lucan is in a townland and civil parish of the same name, in the barony of Newcastle. Road access to Lucan is from the N4, and the M50 motorway at Junction 7.