Greater Dublin Area
The Greater Dublin Area (GDA; Irish: Mórcheantar Bhaile Átha Cliath), or simply Greater Dublin, is the city of Dublin and its hinterland, with varying definitions as to its extent. The National Transport Authority has defined the Greater Dublin Area as including the counties of Dublin (Dublin City, South Dublin, Dún Laoghaire–Rathdown and Fingal), Meath, Kildare, and Wicklow. However, this area does not comprise a formal political unit. The term can also apply more narrowly to the Dublin urban area and nearby suburban towns.
The urban part of Dublin and surrounding areas has been defined by various statutory instruments, mainly those referring to the Garda Síochána and Courts of the Republic of Ireland. However, since 2009, the Garda Division of the Dublin Metropolitan Area no longer overlaps, if it ever did, with the Greater Dublin Area; it is instead co-extensive with the Dublin Region.
The city and five counties were mentioned in the order creating the Dublin Transportation Office, giving functions and representations to the office in the Greater Dublin Area, although not using the term. The office was purely advisory and had no executive powers. The term was also defined in section 3 of the Dublin Transportation Authority Bill, 2008. This bill was never enacted. On 1 December 2009 the DTO was dissolved so this term, if it ever had legal significance, ceased to have relevance as far as the DTO is concerned.
The Garda used the term the Dublin Metropolitan Region (DMR) which was formerly the jurisdiction, within the eastern part of Ireland, of the Dublin Metropolitan Police, which was subsequently merged into An Garda Síochána, the national police force of Ireland. This jurisdiction covered parts of the old County Dublin (except the northern part around Swords) as well as the County Kildare town of Leixlip and the County Wicklow towns of Bray, Greystones and Enniskerry. Swords was covered by the Meath Garda Division. In this way, it differed from the usual definition of County Dublin and did not even conform to the looser definition of the Greater Dublin Area. The definition no longer applies as during 2008 the Garda Divisions were realigned along Regional and county boundaries. As of 2009, the Dublin Metropolitan Region is co-extensive with the Dublin Region.
Leixlip was moved to the County Kildare Division and became the district headquarters for the new Leixlip District . Bray moved into the new County Wicklow Division and became district headquarters for the Bray District .
The term originated from the Police Forces Amalgamation Act, 1925 (Section 3); that act amalgamated the Dublin Metropolitan Police and Garda Síochána as one national police force.
The Regional Planning Guidelines  refer to the Greater Dublin Area. In this context, the area of Dublin and its environs is to be consolidated as a suburban and metropolitan district. It differentiates between which towns are considered suburbs, and which are considered commuter towns. The area is considered as being from Swords and Malahide in Fingal to Greystones in County Wicklow in the south, and as far west as Kilcock in County Kildare. This differs from the Garda designation in that it stretches some 20 km further west.
The population of the Dublin City, suburbs (Dublin City, Fingal, South Dublin & Dún Laoghaire-Rathdown) and Outer Greater Dublin (Meath, Kildare and Wicklow) as of Census 2016 was 1,904,806 persons. This equates to 40.03% of Ireland's population. Estimates published by the Central Statistics Office suggest that the population will reach 2.1 million by 2021, and 2.4 million by 2026. The figures are based on a regional breakdown of previously published national population projections and assume that current demographic trends will continue.
The CSO also uses the narrower definition which comprises Dublin City and its suburbs within the 3 local Dublin authorities.  The boundaries for suburbs are not legally defined, but drawn and revised by the CSO in accordance with United Nations recommendations. The population of the Dublin urban area in 2016 was as follows:
|– in Dún Laoghaire–Rathdown||217,274|
|– in Fingal||296,214|
|– in South Dublin||278,749|
The population of the Greater Dublin area in 2016 was as follows:
|Outer Greater Dublin (Meath, Kildare and Wicklow)||559,404|
† "Proportion" here means the percentage of the population of the Republic of Ireland that lives in the Greater Dublin Area
- Retrieved from Dublin Transportation Office.
- Population and Actual and Percentage Change 2011 to 2016 by Sex, Province County or City, CensusYear and Statistic
- CSO Ireland – Regional Population Projections 2011–2026
- Central Statistics Office (Ireland) (26 April 2007). Census 2006 Volume 1 – Population Classified by Area: Appendices (PDF). Central Statistics Office. Appendix 2, p.164: Dublin Area. Retrieved 15 September 2007.
The description Greater Dublin Area in the 2006 Census denotes Dublin City and its suburbs
- Central Statistics Office (Ireland) (26 April 2007). Census 2006 Volume 1 – Population Classified by Area: Appendices. Appendix 2, p.163: Towns (i) Towns with Legally Defined Boundaries.
where urban areas have extended beyond the legally defined town boundary, the Central Statistics Office draws up new boundaries defining the suburban areas of Cities/Boroughs ... for census purposes ... in conformity with United Nations recommendations, as the continuation of a distinct population cluster outside its legally defined boundary in which no occupied dwelling is more than 200 metres distant from the nearest occupied dwelling ... The suburban boundaries were reviewed for each subsequent census. A comprehensive review was carried out as part of the processing phase of the 2006 Census.
- Population and Actual and Percentage Change 2011 to 2016 by Sex, Province County or City, CensusYear and Statistic "Population of each Province, County and City, 2016" Check
|url=value (help). Retrieved 16 July 2016.
|last1=in Authors list (help)
- Central Statistics Office – Census of Population Database
- Local Government Act, 1991 (Regional Authorities) (Establishment) Order, 1993
- Dublin Regional Authority
- Mid-East Regional Authority
- The Dublin Community Blog
- Greater Dublin population to reach two million, from RTÉ News
- Regional Planning Guidelines for the Greater Dublin Area
- Cities/Towns Boundaries CSO page with links to Shapefile data for the boundary of the CSO-defined Greater Dublin Area; readable by Geographic information systems