| Date |
Constituency |
Loss |
Gain |
Note
|
| 19 September 1923 |
Dublin South |
|
Cumann na nGaedheal |
|
Michael Hayes resigns to sit for NUI[c]
|
| 19 September 1923 |
National University |
|
Cumann na nGaedheal |
|
Ceann Comhairle |
Michael Hayes takes office as Ceann Comhairle[1]
|
| 9 October 1923 |
National University |
|
Cumann na nGaedheal |
|
Eoin MacNeill resigns to sit for Clare[a]
|
| 22 October 1923 |
Dublin South |
|
Cumann na nGaedheal |
|
Death of Philip Cosgrave[6][7]
|
| 27 October 1923 |
Dublin South |
|
|
Cumann na nGaedheal |
Hugh Kennedy holds the seat vacated by the resignation of Hayes[8]
|
| 3 November 1923 |
NUI |
|
|
Cumann na nGaedheal |
Patrick McGilligan holds the seat vacated by the resignation of MacNeill[9]
|
| 20 November 1923 |
Dublin County |
|
Cumann na nGaedheal |
|
Death of Michael Derham[10][11]
|
| 10 January 1924 |
Limerick |
|
Cumann na nGaedheal |
|
Resignation of Richard Hayes[12]
|
| 12 March 1924 |
Dublin South |
|
|
Cumann na nGaedheal |
James O'Mara holds the seat vacated by the death of Cosgrave[13]
|
| 19 March 1924 |
Dublin County |
|
|
Cumann na nGaedheal |
Batt O'Connor holds the seat vacated by the death of Derham[14]
|
| April 1924 |
Mayo North |
|
Cumann na nGaedheal |
|
National Group |
Joseph McGrath joins new party as leader[15][16]
|
| April 1924 |
Carlow–Kilkenny |
|
Cumann na nGaedheal |
|
National Group |
Seán Gibbons joins new party[15]
|
| April 1924 |
Cavan |
|
Cumann na nGaedheal |
|
National Group |
Seán Milroy joins new party[15]
|
| April 1924 |
Dublin North |
|
Cumann na nGaedheal |
|
National Group |
Francis Cahill joins new party[15]
|
| April 1924 |
Dublin North |
|
Cumann na nGaedheal |
|
National Group |
Seán McGarry joins new party[15]
|
| April 1924 |
Dublin South |
|
Cumann na nGaedheal |
|
National Group |
Daniel McCarthy joins new party[15]
|
| April 1924 |
Leitrim–Sligo |
|
Cumann na nGaedheal |
|
National Group |
Thomas Carter joins new party[15]
|
| April 1924 |
Leitrim–Sligo |
|
Cumann na nGaedheal |
|
National Group |
Alexander McCabe joins new party[15]
|
| April 1924 |
Roscommon |
|
Cumann na nGaedheal |
|
National Group |
Henry Finlay joins new party[15]
|
| 9 May 1924 |
Mayo North |
|
Cumann na nGaedheal |
|
Disqualification of Henry Coyle[17]
|
| 28 May 1924 |
Limerick |
|
|
Cumann na nGaedheal |
Richard O'Connell holds the seat vacated by the resignation of Hayes[18]
|
| 5 June 1924 |
Dublin South |
|
Cumann na nGaedheal |
|
Resignation of Hugh Kennedy on appointment as Chief Justice[19]
|
| 20 July 1924 |
Cork East |
|
Cumann na nGaedheal |
|
Death of Thomas O'Mahony[20]
|
| 1 August 1924 |
Cork Borough |
|
Cumann na nGaedheal |
|
Resignation of Alfred O'Rahilly[21]
|
| 1 August November 1924 |
Donegal |
|
Cumann na nGaedheal |
|
Resignation of Peter Ward[21]
|
| 29 October 1924 |
Mayo North |
|
National Group |
|
Resignation of Joseph McGrath[22]
|
| 30 October 1924 |
Carlow–Kilkenny |
|
National Group |
|
Resignation of Seán Gibbons[23]
|
| 30 October 1924 |
Cavan |
|
National Group |
|
Resignation of Seán Milroy[23]
|
| 30 October 1924 |
Dublin North |
|
National Group |
|
Resignation of Francis Cahill[23]
|
| 30 October 1924 |
Dublin North |
|
National Group |
|
Resignation of Seán McGarry[23]
|
| 30 October 1924 |
Dublin South |
|
National Group |
|
Resignation of Daniel McCarthy[23]
|
| 30 October 1924 |
Leitrim–Sligo |
|
National Group |
|
Resignation of Thomas Carter[23]
|
| 30 October 1924 |
Leitrim–Sligo |
|
National Group |
|
Resignation of Alexander McCabe[23]
|
| 30 October 1924 |
Roscommon |
|
National Group |
|
Resignation of Henry Finlay[23]
|
| 18 November 1924 |
Cork East |
|
|
Cumann na nGaedheal |
Michael Noonan holds the seat vacated by the death of O'Mahony[24]
|
| 18 November 1924 |
Dublin South |
|
|
Republican |
Seán Lemass gains the seat vacated by the resignation of Kennedy[24]
|
| 18 November 1924 |
Mayo North |
|
|
Republican |
John Madden gains the seat vacated by the disqualification of Coyle[24]
|
| 19 November 1924 |
Cork Borough |
|
|
Cumann na nGaedheal |
Michael Egan holds the seat vacated by the resignation of O'Rahilly[24]
|
| 20 November 1924 |
Donegal |
|
|
Cumann na nGaedheal |
Denis McCullough holds the seat vacated by the resignation of Ward[24]
|
| 11 March 1925 |
Carlow–Kilkenny |
|
|
Cumann na nGaedheal |
Thomas Bolger holds the seat vacated by the resignation of Gibbons[25]
|
| 11 March 1925 |
Cavan |
|
|
Cumann na nGaedheal |
John Joe O'Reilly holds the seat vacated by the resignation of Milroy[25]
|
| 11 March 1925 |
Dublin North |
|
|
Cumann na nGaedheal |
Patrick Leonard holds the seat vacated by the resignation of Cahill[26]
|
| 11 March 1925 |
Dublin North |
|
|
Republican |
Oscar Traynor gains the seat vacated by the resignation of McGarry[26]
|
| 11 March 1925 |
Dublin South |
|
|
Cumann na nGaedheal |
Thomas Hennessy holds the seat vacated by the resignation of McCarthy[26]
|
| 11 March 1925 |
Leitrim–Sligo |
|
|
Republican |
Samuel Holt gains the seat vacated by the resignation of Carter[25]
|
| 11 March 1925 |
Leitrim–Sligo |
|
|
Cumann na nGaedheal |
Martin Roddy holds the seat vacated by the resignation of McCabe[25]
|
| 11 March 1925 |
Mayo North |
|
|
Cumann na nGaedheal |
Michael Tierney holds the seat vacated by the resignation of McGrath[25]
|
| 11 March 1925 |
Roscommon |
|
|
Cumann na nGaedheal |
Martin Conlon holds the seat vacated by the resignation of Finlay[25]
|
| 27 October 1926 |
Dublin County |
|
Independent |
|
Death of Darrell Figgis[27]
|
| 30 November 1925 |
Leix–Offaly |
|
Republican |
|
Disqualification of Seán McGuinness[28]
|
| 25 January 1926 |
National University |
|
Cumann na nGaedheal |
|
Clann Éireann |
William Magennis joins new party
|
| 25 January 1926 |
Galway |
|
Cumann na nGaedheal |
|
Clann Éireann |
Pádraic Ó Máille joins new party
|
| 25 January 1926 |
Wicklow |
|
Cumann na nGaedheal |
|
Clann Éireann |
Christopher Byrne joins new party
|
| 18 February 1926 |
Dublin County |
|
|
Labour |
William Norton gains the seat vacated by the death of Figgis[29]
|
| 18 February 1926 |
Leix–Offaly |
|
|
Cumann na nGaedheal |
James Dwyer gains the seat vacated by the disqualification of McGuinness[29]
|
| 16 May 1926 |
Clare |
|
Republican |
|
Fianna Fáil |
Éamon de Valera founds new party Fianna Fáil as party leader
|
| 1926 |
Louth |
|
Republican |
|
Fianna Fáil |
Frank Aiken joins new party
|
| 1926 |
Roscommon |
|
Republican |
|
Fianna Fáil |
Gerald Boland joins new party
|
| 1926 |
Tipperary |
|
Republican |
|
Fianna Fáil |
Dan Breen joins new party
|
| 1926 |
Leitrim–Sligo |
|
Republican |
|
Fianna Fáil |
Frank Carty joins new party
|
| 1926 |
Limerick |
|
Republican |
|
Fianna Fáil |
James Colbert joins new party
|
| 1926 |
Galway |
|
Republican |
|
Fianna Fáil |
Frank Fahy joins new party
|
| 1926 |
Leitrim–Sligo |
|
Republican |
|
Fianna Fáil |
Samuel Holt joins new party
|
| 1926 |
Longford–Westmeath |
|
Republican |
|
Fianna Fáil |
James Killane joins new party
|
| 1926 |
Mayo South |
|
Republican |
|
Fianna Fáil |
Michael Kilroy joins new party
|
| 1926 |
Dublin South |
|
Republican |
|
Fianna Fáil |
Seán Lemass joins new party
|
| 1926 |
Monaghan |
|
Republican |
|
Fianna Fáil |
Patrick MacCarvill joins new party
|
| 1926 |
Dublin South |
|
Republican |
|
Fianna Fáil |
Constance Markievicz joins new party
|
| 1926 |
Kerry |
|
Republican |
|
Fianna Fáil |
Tom McEllistrim joins new party
|
| 1926 |
Dublin North |
|
Republican |
|
Fianna Fáil |
Seán T. O'Kelly joins new party
|
| 1926 |
Donegal |
|
Republican |
|
Fianna Fáil |
Joseph O'Doherty joins new party
|
| 1926 |
Dublin North |
|
Republican |
|
Fianna Fáil |
Seán T. O'Kelly joins new party
|
| 1926 |
Mayo North |
|
Republican |
|
Fianna Fáil |
P. J. Ruttledge joins new party
|
| 1926 |
Leitrim–Sligo |
|
Republican |
|
Fianna Fáil |
Frank Carty joins new party
|
| 1926 |
Wexford |
|
Republican |
|
Fianna Fáil |
James Ryan joins new party
|
| 1926 |
Carlow–Kilkenny |
|
Republican |
|
Fianna Fáil |
Michael Shelly joins new party
|
| 1926 |
Cavan |
|
Republican |
|
Fianna Fáil |
Patrick Smith joins new party
|
| September 1926 |
Waterford |
|
Independent |
|
National League |
William Redmond joins new party as founder member
|
| September 1926 |
Galway |
|
Independent |
|
National League |
James Cosgrave joins new party as founder member
|
| 19 January 1927 |
Limerick |
|
Cumann na nGaedheal |
|
Death of James Ledden[30]
|
| 25 January 1927 |
Tipperary |
|
Fianna Fáil |
|
Ind. Republican |
Dan Breen takes the Oath of Allegiance[31][32]
|
| May 1927 |
Carlow–Kilkenny |
|
Farmers' Party |
|
Cumann na nGaedheal |
Denis Gorey selected as candidate for Cumann na nGaedheal[33]
|