Carrickmines (Irish: Carraig Mhaighin, meaning “Plateau of rock”) is an outer suburb of Dublin in Dún Laoghaire–Rathdown, Ireland. The area, still semi-rural, was historically on the border of English control and featured a defensive construction, Carrickmines Castle, which became the subject of national controversy during the building of a late stage of Dublin’s M50 orbital motorway.

Traditionally a rural area, and today a semi-rural suburban region, Carrickmines is now divided northeast/southwest by the M50 motorway, with, to the northeast, more established residential areas, and to the southwest, notably along Glenamuck Road, new retail parks, office buildings, and housing schemes including many apartments.