Loughlinstown is the location of St. Columcille's Hospital, which serves both south Dublin and north Wicklow. The European Foundation for the Improvement of Living and Working Conditions, an EU body, is located in Loughlinstown House.
Loughlinstown (also Loughnanstown EME) is a derivation of the townland's ancient name, Lochan, which is said to have originally encircled a small lake at the meeting of the Carrickmines River and Bride's Glen Stream.
Loughlinstown was inhabited from at least the Neolithic period when the megalithic portal tomb at Cromlech Fields was constructed circa 2,500 B.C. Following Henry II's conquest of Ireland the lands around Loughlinstown were granted to the Anglo-Norman Talbot Family. By 1541 they had been granted to Goodman Family, who held them as "warden of the marches" protecting the southern border of the Pale from raids and incursions of the Wicklow Septs.
A 1654 survey describes the area as containing 458 acres, of which 300 acres were the property of James Goodman, who acted as Provost Marshal of the Irish Confederate Army during the Irish Rebellion of 1641. The remaining 128 acres were the property of the Dean of Christchurch.
Loughlinstown was granted to Sir William Domville, Attorney General for Ireland, in the reign of Charles II and James II. The Domville family held the lands for three centuries until 1962 when they were sold to Sir John Galvin.
In 1975 Loughlinstown House and Commons were the subject to a Compulsory Purchase Order by then Dublin Corporation.
The village of Loughlinstown grew up on commonage land on the Dublin to Bray high road. During the 1960s, one of the earliest stretches of dual carriageway in Ireland was built through the area, leaving the village scattered along the western side of the new road.
For years a large mature chestnut tree was located in the middle of the dual carriageway at its junction with the Wyatville Road. It was known as The Big Tree and was a landmark feature on the road from Dublin to Wicklow. In the 1970s the junction was upgraded and the tree removed. In 2004 the 1960s road was replaced with a new dual carriageway and the junction was replaced with an overbridge.
The Rathdown Union, which was established in 1839, constructed a workhouse on 8 acres of land just south of Loughlinstown village. The institution provided 600 places for the destitute of Dundrum, Blackrock, Stillorgan, Kingstown (Dún Laoghaire), Killiney, Glencullen, Rathmichael, Powerscourt, Bray and Delgany.At the height of the Irish Famine the workhouse catered for almost 800 individuals. The institution now houses St. Columcille's Hospital.
- Clare, Liam (1986), Loughlinstown Workhouse in the 1840s, Foxrock Local History Club, ISSN 0791-2870
- Clare, Liam (2004), Loughlinstown Commons Before 1870, Foxrock Local History Club, ISSN 0791-2870
- D'Alton, John (1838), The history of the county of Dublin, Hodges and Smith
- Ryan, Dr Rita (1983), Loughlinstown House, Foxrock Local History Club, ISSN 0791-2870