Dublin 1

D1 lies entirely within the Dáil constituency of Dublin Central. Dublin Central is one of the most densely populated and socially and ethnically diverse areas in Ireland.^[1] The postcode consists of most of the northern city centre,^{[citation needed]} affluent white collar areas around and including Mayor Square,^{[citation needed]} and traditional working class areas such as Sheriff Street.^[2] In 2019, the Irish Independent reported that Dublin City Council embarked on a plan to improve lighting and surfacing in the area's laneways^[3] while Ireland's National Tourism Development Authority has said the regeneration of a historic part of Dublin 1 tied to the Easter Rising is "long overdue".^[4] The American Institute of Architects has been hired by a local business group to help regenerate the area, which they say faces "civic schizophrenia" and "a split personality".^[5]

The postcode covers a dense central area north of the River Liffey. It includes O'Connell Street,^[6] Parnell Street,^[7] Henry Street,^[8] Jervis Street,^[9] Mountjoy Square,^[10] Parnell Square,^[11] the International Financial Services Centre,^[12] and parts of the northern Docklands.^[13] It is home to Busarus,^[14] Connolly Station,^[15] the Custom House,^[16] the Convention Centre Dublin,^[17] and several of the north city quays. It also features urban secondary schools such as the O'Connell School^[18] and Belvedere College^[19] as well as third-level institutions such as the National College of Ireland.^[20]

The postal district of Dublin 1 is used in conjunction with the seven-digit Eircodes that are unique to each address in the state.^[21] For example:

Dublin City Gallery The Hugh Lane
Charlemont House
Parnell Square North
Dublin 1
D01 F2X9

• 
  The Garden of Remembrance, Parnell Square.
• 
  Neoclassical buildings along O'Connell Street.
• 
  A restaurant in Dublin's Chinatown, Parnell Street.
• 
  The Hugh Lane Gallery, Parnell Square.
• 
  The Central Bank of Ireland, North Wall Quay.
• 
  Mountjoy Square in winter.

• List of Dublin postal districts
• List of Eircode routing areas in Ireland
• List of postal codes