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

| No_ | Constituency | Created | Seats | Change_ |
|---|---|---|---|---|
| 34 | Mayo | 1997 | 5 | none |
| 35 | Meath East | 2007 | 3 | plus 3 |
| 36 | Meath West | 2007 | 3 | plus 3 |
| 37 | Roscommon–South Leitrim | 2007 | 3 | plus 3 |
| 38 | Sligo–North Leitrim | 2007 | 3 | plus 3 |
| 39 | Tipperary North | 1948 | 3 | none |
| 40 | Tipperary South | 1948 | 3 | none |
| 41 | Waterford | 1923 | 4 | none |
| 42 | Wexford | 1921 | 5 | none |
| 43 | Wicklow | 1923 | 5 | none |