Electoral (Amendment) Act 2005 Constituencies for the 30th Dáil Constituencies for the 30th Dáil

| No_ | Constituency | Created | Seats | Change_ |
|---|---|---|---|---|
| 17 | Dublin South | 1981 | 5 | none |
| 18 | Dublin South–Central | 1948 | 5 | none |
| 19 | Dublin South–East | 1948 | 4 | none |
| 20 | Dublin South–West | 1981 | 4 | none |
| 21 | Dublin West | 1981 | 3 | none |
| 22 | Dún Laoghaire | 1977 | 5 | none |
| 23 | Galway East | 1977 | 4 | none |
| 24 | Galway West | 1937 | 5 | none |
| 25 | Kerry North | 1969 | 3 | none |
| 26 | Kerry South | 1937 | 3 | none |
| 27 | Kildare North | 1997 | 4 | plus 1 |
| 28 | Kildare South | 1997 | 3 | none |
| 29 | Laois–Offaly | 2007 | 5 | plus 5 |
| 30 | Limerick East | 1948 | 5 | none |
| 31 | Limerick West | 1948 | 3 | none |
| 32 | Longford–Westmeath | 2007 | 4 | plus 4 |
| 33 | Louth | 1923 | 4 | none |