1 November 1906: Galway Borough – Stephen Gwynn (Irish Parliamentary Party) replacing Charles Ramsay Devlin (Irish Parliamentary Party) who resigned, returned to Canada.

31 December 1906: Cork Mid – D. D. Sheehan (Independent Labour) returned unopposed after he was expelled from the Irish Parliamentary Party, resigned his seat and restood on an Independent Labour ticket.

13 April 1907: Westmeath South – Sir Walter Nugent, 4th Baronet (Irish Parliamentary Party) replacing Donal Sullivan (Irish Parliamentary Party) who died 3 March' 20 June 1907: Monaghan North – James Carrige Rushe Lardner (Irish Parliamentary Party) replacing Patrick O'Hare (Irish Parliamentary Party) who resigned on the grounds of ill-health.

21 February 1908: North Leitrim – Francis Meehan (Irish Parliamentary Party) replacing Charles Dolan (Irish Parliamentary Party) who resigned order to re-fight the constituency on behalf of Sinn Féin.

1 May 1909: Cork City – Maurice Healy (Independent Nationalist) replacing William O'Brien (Irish Parliamentary Party) who had resigned.