Crumlin covers the area from the River Poddle near the KCR to the Drimnagh Road, to Bunting Road, and is situated not far from the city centre, on the Southside of Dublin city. Neighbouring areas include Walkinstown, Perrystown, Drimnagh and Kimmage. Crumlin is contained within postal district Dublin 12.
Name and History
Crumlin gets its name from the crooked valley known as Lansdowne Valley. The valley was formed by glacial erosion in the distant past and is now bisected by the River Camac. The valley is situated behind Drimnagh and is largely made up of recreational parkland.
During the medieval period, Dublin was surrounded by manorial settlements comprising church, graveyard, manor house, motte and bailey, farms and cottages. These settlements grew into a network of villages around Dublin creating stability and continuity of location. Crumlin Village developed as an Anglo-Norman settlement soon after the Norman Conquest in 1170, (although the circular configuration of the old graveyard of Saint Mary’s in the village suggests pre-Norman associations), and has survived through the centuries to become the village of today. The Old Saint Mary's Church stands on the site of a 12th-century church of the same dedication, and a succession of churches occupied the site down through the centuries to the present day.
In 1193, King John (the then Prince of Moreton) gave the Crumlin church to form one prebend in the collegiate church of Saint Patrick. When the main body of the present old church was rebuilt in 1817, the old tower of a much earlier origin was preserved.
Crumlin, along with Saggart, Newcastle, Lyons and Esker (Lucan) was constituted a royal manor by King John sometime before the end of his reign in 1216. The English noble families of the time had strong links with Ireland, particularly in Leinster. For example William Fitz John of Harptree was a lord of some significance in Somerset and likely to have served in Ireland under King John. At the beginning of the reign of King Henry III, Fitz John acquired the custody of the lands of William de Carew and held the royal manor of Crumlin, although he did not establish family roots in Ireland.  
As the church was the nucleus of life on the manor in medieval times, we may with confidence place the centre of Crumlin’s medieval settlement in the area of Crumlin Village. This has been confirmed by recent archaeological excavations in the area of Saint Mary’s and the site of the former motte and earthworks on which the new St. Mary's Church was built.
Some of the local amenities in Crumlin, such as Pearse College on Clogher Road and Ceannt park, are named after some of the 1916 Rebels who had a training camp in nearby Kimmage at Sundrive crossroads.
Notable people who have lived in or been associated with the area include:
- Conor McGregor, a current mix martial artist fighting in the featherweight and lightweight division of the UFC, the holder of the featherweight and lightweight belt simultaneously in Cage Warriors
- Joseph Deane (1674–1715) politician of the Irish House of Commons, judge, Chief Baron of the Irish Exchequer, and owner of the Crumlin estate was born in Crumlin.
- Brendan Behan moved to Crumlin from Dublin City Centre. He lived at 70 Kildare Road where the house is marked with a plaque in his honour.
- Christy Brown, the Irish author, painter and poet, was born in Crumlin.
- Gabriel Byrne, actor, was born in Crumlin 
- Paddy Casey, the singer/songwriter, is from Cashel Road in Crumlin.
- Martin Cahill, a Dublin underworld figure, lived in Crumlin.
- Gemma Craven, the actress, is from Crumlin.
- Zak Martin, New Age figure and best-selling author is from Clonard Road in Crumlin.
- Martin Duffy, filmmaker and author was from Leighlin Road, Crumlin. Duffy based his first feature film The Boy from Mercury on his childhood experiences in the neighborhood, and detailed life there from the 1930s onwards in the biography of his parents, "Barney and Molly".
- Richie Egan, bass player in The Redneck Manifesto (band) and lead singer of Jape (band), is from Crumlin.
- Seamus Elliott, cyclist, was a stage winner in the Giro d'Italia in 1960 and the Vuelta a Espana in 1962. He also won a stage in Tour de France and held the Tour's yellow jersey for 2 days.
- Larry Flood, the former Irish Olympic boxer and Irish welter champion, lived in Crumlin.
- Henry Mitchell Jones, recipient of the Victoria Cross
- Liam Lawlor, the high profile and controversial Irish TD, was born in Crumlin.
- Phil Lynott of the rock band Thin Lizzy used to live on Leighlin Road and Rutland Avenue, Crumlin. The "Black Rose" (Rosin Dubh) famously said "When I'm in England, I say, I'm from Ireland. When I'm in Ireland, I say, I'm from Dublin. When I'm in Dublin, I say, I'm from Crumlin. When I'm in Crumlin, I say, Leighlin Road. When I'm in Leighlin Road, I say, I'm a Lynott." - Phil Lynott
- Paul McGrath, the former footballer who played with the Republic Of Ireland, Manchester United and Aston Villa, grew up in Crumlin having played for St. Patrick's Athletic of Inchicore.
- Joey O'Brien (footballer), West Ham United and Republic of Ireland midfielder. Joey grew up on Sundrive Road, which is just around the corner from where Andy Reid grew up.
- Noel Pearson, theatrical and film producer, is from Crumlin.
- Fintan O'Toole, journalist and Irish Times assistant editor, grew up in Crumlin.
- Niall Quinn, Sunderland AFC Chairman.
- Andy Reid, Sunderland AFC player. Andy grew up on Clogher Road in Crumlin.
- Eamonn Rogers, the former footballer who played with the Republic of Ireland, Blackburn Rovers and Charlton Athletic, grew
- CBS Armagh Road
- Loreto College
- Rosary College
- St.Agnes NS, who also maintain a very successful violin project launched in September 2006
- Ard Scoil Eanna
Bus Átha Cliath routes serving the Crumlin area are: 17,18,9,56A,27,77A,83,83A,122,123,150,151
- "Crumlin GAA Club" is the Gaelic Athletic Association of the parish. It is based in Pearse Park, with its Clubrooms in O'Toole Park
- "Guinness Rugby Football Club" (Guinness R.F.C.) is based in the Iveagh Sports Grounds on the Crumlin Road.
- "Crumlin United F.C." are a senior football team from the area. They play in the Leinster Senior League, and their most noted former player was Robbie Keane
- "St James's Gate F.C." play their home games at the Iveagh Grounds, Crumlin Road. They compete in the Leinster Senior League.
- "Lourdes Celtic F.C." are a Junior football team from the Sundrive area, they play mostly in the Leinster Junior Leagues. Noted international players such as Damien Duff and Andy Reid (footballer) played at junior level for the club.
- "Crumlin Boxing Club" is based in Windmill road and produced Dean Byrne.
- "St James Gaels" is another Gaelic Athletic Association club in the area. They play their home games at the Iveagh Grounds on the Crumlin Road.
- "Crumlin Bowling Club".This club is located at St.Mary's Road, Crumlin. It was originally part of the Imperial Tobacco Company from 1926 to 1947.
The Crumlin Bowling Club was founded in 1947 and is still one of the premier bowling clubs in Ireland. It is affiliated to the Bowling League of Ireland and the Irish Bowling Association.
- "Main Stage Wrestling Academy". Located on Sundrive Road, this is one of the top professional wrestling schools in Ireland.
- Crumlin GAA Club
- Crumlin Boxing Club
- St. James Gaels GAA Club
- Lourdes Celtic F.C.
- A heart in Jerusalem, A head in Crumlin, Irish Times
- Robbie keane, Crumlin United