Ireland was allocated an additional seat in 2023 after a pre-election assessment of the parliament composition based on the most recent population figures.

Irish citizens and other non-Irish EU citizens residing in the country are entitled to vote in the European elections in Ireland, provided that they are registered to vote for EU elections and that they compiled a statutory declaration issued by the local authority of their residence.

[12] On Friday 30 May RTÉ One's Prime Time hosted 8 candidates from the South constituency: Lorna Bogue (Rabh), Paul Gavan (SF), Niamh Hourigan (Lab), Billy Kelleher (FF), Michael McNamara (Ind), John Mullins (FG), Grace O'Sullivan (GP) and Mick Wallace of (I4C).

[13] On Tuesday 4 June RTÉ One's Prime Time hosted 8 candidates from the Dublin constituency: Barry Andrews (FF), Ciarán Cuffe (GP), Clare Daly (I4C), Regina Doherty (FG), Aodhán Ó Riordáin (Lab), Lynn Boylan (SF), Sinéad Gibney (SDs) and Bríd Smith (PBP–S).

Another senator elected as an MEP had resigned her Seanad seat on 10 July, and was replaced by a nominee on the same day.