Cork North-West is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects three deputies (Teachtaí Dála, commonly known as TDs) on the system of proportional representation by means of the single transferable vote (PR-STV).
The Constituency Review Report 2023 of the Electoral Commission recommended that at the next general election, Cork North-West be altered with the transfer of territory from Cork East and Cork North-Central and the transfer of territory (in the Ballincollig area) to Cork North-Central.
For the 2024 general election, the Electoral (Amendment) Act 2023 defines the constituency as:
| +Changes to the Cork North-West constituency | |||
| 1981–1992 | 3 | The county of Cork, except the parts in the constituencies of Cork East, Cork North-Central, Cork South-Central and Cork South-West. | |
| 1992–1997 | DEDs of Dripsey, Firmount and Matehy transferred from Cork North-Central. | ||
| 1997–2002 | DEDs of Ahil and Douce transferred to Cork South-West. | ||
| 2002–2007 | ED of Carrigrohane Beg transferred from Cork North-Central and the electoral division of Ovens transferred from Cork South-Central | ||
| 2007–2011 | 3 | ED of Ballincollig transferred from Cork South-Central. | |
| 2011–2016 | 3 | EDs of Kilcullen, Mountrivers, Dromore and Kilshannig transferred to Cork North-Central. | |
| 2016– | 3 | EDs of Kilcullen, Mountrivers, Dromore and Kilshannig transferred from Cork North-Central. |
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