Dún Laoghaire–Rathdown in the context of "Eastern and Midland Region"

Dún Laoghaire (/dʌn ˈlɪəri/ dun LEER-ee, Irish: [ˌd̪ˠuːn̪ˠ ˈl̪ˠeːɾʲə, - ˈl̪ˠiːɾʲə]) is a suburban coastal town in County Dublin in Ireland. It is the administrative centre of the county of Dún Laoghaire–Rathdown. The town was built up alongside a small existing settlement following 1816 legislation that allowed the building of a major port to serve Dublin. It was known as Dunleary in the English language, until it was renamed Kingstown in honour of King George IV's 1821 visit, and in 1920 was given its present name, which is the original Irish form from which "Dunleary" was anglicised. Over time, the town became a residential location, a seaside resort, the terminus of Ireland's first railway and the administrative centre of the former borough of Dún Laoghaire, and from 1994, of the county of Dún Laoghaire–Rathdown.

County Dublin (Irish: Contae Bhaile Átha Cliath or Contae Átha Cliath) is a county in Ireland, and holds its capital city, Dublin. It is located on the island's east coast, within the province of Leinster. Until 1994, County Dublin (excluding the city) was a single local government area; in that year, the county council was divided into three new administrative counties: Dún Laoghaire–Rathdown, Fingal and South Dublin. The three administrative counties together with Dublin City proper form a NUTS III statistical region of Ireland (coded IE061). County Dublin remains a single administrative unit for the purposes of the courts (including the Dublin County Sheriff, but excluding the bailiwick of the Dublin City Sheriff) and Dublin County combined with Dublin City forms the Judicial County of Dublin, including Dublin Circuit Court, the Dublin County Registrar and the Dublin Metropolitan District Court. Dublin also sees law enforcement (the Garda Dublin metropolitan division) and fire services (Dublin Fire Brigade) administered county-wide.

Dublin is Ireland's most populous county, with a population of 1,458,154 as of 2022 – approximately 28% of the Republic of Ireland's total population. Dublin city is the capital and largest city of the Republic of Ireland, and the largest city on the island of Ireland. Roughly 9 out of every 10 people in County Dublin lives within Dublin city and its suburbs. Several sizeable towns that are considered separate from the city, such as Rush, Donabate and Balbriggan, are located in the far north of the county. Swords, while separated from the city by a green belt around Dublin Airport, is considered a suburban commuter town and an emerging small city.

County Wicklow (/ˈwɪkloʊ/ WIK-loh; Irish: Contae Chill Mhantáin [ˈkɔn̪ˠt̪ˠeː ˌçiːl̠ʲ ˈwan̪ˠt̪ˠaːnʲ]) is a county in Ireland. The last of the traditional 32 counties, having been formed as late as 1606, it is part of the Eastern and Midland Region and the province of Leinster. It is bordered by the Irish Sea to the east and the counties of Wexford to the south, Carlow to the southwest, Kildare to the west, and South Dublin and Dún Laoghaire–Rathdown to the north.

Wicklow is named after its county town of Wicklow, which derives from the name Víkingaló (Old Norse for "Vikings' Meadow"). Wicklow County Council is the local authority for the county, which had a population of 155,258 at the 2022 census. Colloquially known as the "Garden of Ireland" for its scenery—which includes extensive woodlands, nature trails, beaches, and ancient ruins while allowing for a multitude of walking, hiking, and climbing options—it is the 17th largest of Ireland's 32 counties by area and the 16th largest by population. It is also the fourth largest of Leinster's 12 counties by size and the fifth largest in terms of population.

Dublin Fire Brigade (DFB; Irish: Briogáid Dóiteáin Átha Cliath) is the fire and rescue service and ambulance service for County Dublin, including Dublin city, in Ireland. It is a local authority service, operated by Dublin City Council on behalf of that council and those of Fingal, Dún Laoghaire–Rathdown and South Dublin. There are currently 14 fire stations staffed by DFB, 12 of which are full-time, the other 2 are "retained" (they work on a pager system, with staff having between 5 and 7 minutes to attend the station in the event of a call) and operate on call 24/7 365 days a year with up to 500 calls per year. Full-time stations are staffed by shifts across 4 watches (A, B, C & D). There are currently over 963 active firefighter/paramedic personnel making it by far the largest fire service based on personnel and resources in Ireland.

Dalkey (/ˈdɔːki/ DAW-kee; Irish: Deilginis, meaning 'thorn island') is a suburban town in Dún Laoghaire–Rathdown county southeast of Dublin, Ireland. It was founded as a Viking settlement and became a port in the Middle Ages. According to chronicler John Clyn (c.1286–c.1349), it was one of the ports through which the plague entered Ireland in the mid-14th century. Dalkey lies within a townland and civil parish of the same name, in the barony of Rathdown.

One of Dublin's wealthiest districts, it has been home to writers, artists, and celebrities, including George Bernard Shaw, Jane Emily Herbert, Julius Olsson, Maeve Binchy, Robert Fisk, and Hugh Leonard.