| 12th Dáil | |
| Term Start: | 9 June 1944 |
| Term End: | 12 January 1948 |
| Membership1: | 138 |
| Chamber1 Leader3: | Seán Lemass — Seán T. O'Kelly |
| Session1 Start: | 9 June 1944 |
| Session1 End: | 28 June 1944 |
| Session2 Start: | 19 September 1944 |
| Session2 End: | 20 July 1945 |
| Session3 Start: | 10 October 1945 |
| Session3 End: | 21 August 1946 |
| Session4 Start: | 23 October 1946 |
| Session4 End: | 6 August 1947 |
| Session5 Start: | 8 October 1947 |
| Session5 End: | 11 December 1947 |
The 12th Dáil was elected at the 1944 general election on 30 May 1944 and first met on 9 June 1944. The members of Dáil Éireann, the house of representatives of the Oireachtas (legislature), of Ireland are known as TDs. It sat with the 5th Seanad as the two Houses of the Oireachtas.
The 12th Dáil was dissolved by President Seán T. O'Kelly on 12 January 1948, at the request of the Taoiseach Éamon de Valera. The 12th Dáil lasted days.
| Party | May 1944 | Jan. 1948 | |
|---|---|---|---|
| 76 | 76 | ||
| 30 | 25 | ||
| 11 | 11 | ||
| 8 | 8 | ||
| 4 | 4 | ||
| 0 | 2 | ||
| 9 | 9 | ||
| 1 | |||
| 2 | |||
Fianna Fáil, denoted with bullet, formed the 4th government of Ireland, a minority government relying on the support of the National Labour Party and Independent TDs.
This is a graphical comparison of party strengths in the 12th Dáil from June 1944. This was not the official seating plan.
On 9 June 1944, Frank Fahy (FF), who had served as Ceann Comhairle since 1932, was proposed by Éamon de Valera and seconded by Richard Mulcahy for the position, and was elected without a vote.[1]
The list of the 138 TDs elected, is given in alphabetical order by Dáil constituency.[2]
Eamonn Coogan (FG), an outgoing TD for Kilkenny, died after the dissolution of the 12th Dáil, during the 1948 general election campaign.