Malcolm Byrne, an Irish Fianna Fáil politician, is born in Gorey, County Wexford, on April 25, 1974. He serves as a Teachta Dála (TD) for the Wicklow–Wexford constituency since the 2024 Irish general election. He previously serves as a Senator for the Cultural and Educational Panel from 2020 to 2024. He represents the Wexford constituency from 2019 to 2020.

Byrne is the eldest child from a family of five. He attends St. Joseph’s CBS secondary school in Gorey, later studying law at University College Dublin (UCD). He is secretary of the Kevin Barry Cumann while at UCD. He Is involved in student politics, serving as education officer for both UCD Students’ Union and the Union of Students in Ireland, and as an executive member of the European Students’ Union.

Byrne describes the 1989 Tiananmen Square protests and massacre and the fall of the Berlin Wall as influencing his decision to enter politics.

Byrne is Head of Communications with the Higher Education Authority (HEA) until 2019, and has been Vice-President of the National Youth Council of Ireland. In 2014, he is named as one of the European 40 Under 40, in the European Young Leaders Programme.

When first elected to Gorey Town Council on the first count in the 1999 Irish local elections, he is its youngest member at the age of 25. He tops the poll again at the 2004 Irish local elections. He is first elected to Wexford County Council in the 2009 Irish local elections for the Gorey local electoral area, and elected Chairman following his 2014 re-election.

In January 2006, The Sun includes Byrne’s picture on the cover of its Irish edition beneath the headline “Bertie‘s FF Man in Gay Web Shame,” revealing that Byrne has a profile on the dating website Gaydar. He responds at the time, “I have not, nor have I ever, done anything illegal and I am not a hypocrite in any way. My views on gay rights issues are well known. I am not married with four children or anything like that, so there is no suggestion of hypocrisy.” His family and political career suffer as a result and he is not selected for candidacy in the 2007 Irish general election following this incident. He later describes how a journalist from The Gorey Echo first approaches him, “The first few questions were about roads. Then the journalist said, ‘Are you aware you have a profile on this dating website?'” When he confirms that the profile is his, he experiences a sleepless night before The Gorey Echo outs him locally: “I was ringing around people I knew and my parents were ringing around people … my grandmother didn’t know and a lot of my extended family and my friends didn’t know.” Gorey Echo group editor Tom Mooney defends the publication by saying he believes Byrne’s behaviour to be “unfitting of a public representative.”

Byrne is a candidate for Fianna Fáil in the 2016 Irish general election in the Wexford constituency, but does not win a seat.

Byrne contests the 2019 European Parliament election for Fianna Fail in the South constituency, having unexpectedly beaten Cork TD Billy Kelleher in the vote for the party’s nomination. However, Kelleher is later added to the ticket. Fianna Fáil then divides the constituency geographically, asking people in counties Carlow, Kilkenny, Laois, Offaly, Tipperary, Waterford, Wexford and Wicklow to vote for Byrne, and those in counties Cork, Kerry, Clare and Limerick to vote for Kelleher. Kelleher wins 11.69% of the first-preference votes (FPV) and is elected on the 17th count. Byrne wins 9.62% of the FPV, and is eliminated on the 16th count.

Byrne is elected as a TD at the 2019 Wexford by-election. Andrew Bolger is co-opted to Byrne’s seat on Wexford County Council following his election to the Dáil. His maiden speech is about housing solutions and the need to address the challenges facing Generation Rent. In an interview he says he can envisage a United Ireland where the 12th of July and Saint Patrick’s Day are public holidays and speaks about how Ireland needs to ensure Unionists feel at home in a new agreed state and that may mean addressing issues such as Ireland joining the Commonwealth.

Byrne loses his Dáil seat at the 2020 Irish general election, following what he calls “a dirty campaign.” His defeat after only 71 days makes him the TD with the second-shortest term of service, after the Anti H-Block TD Kieran Doherty, who dies on hunger strike in August 1981, only 52 days after his election.

On March 31, 2020, Byrne is elected to Seanad Éireann at the 2020 Seanad election. He is named as Fianna Fáil spokesperson on Higher Education, Innovation and Science by Taoiseach Micheál Martin in July 2020.

As a senator, Byrne is a vocal critic of human rights abuses in China. In February 2021, he becomes co-chair of the Inter-Parliamentary Alliance on China, along with Senator Barry Ward of Fine Gael. Byrne is a member of the cross-party Oireachtas Friends of Israel in the Oireachtas.

At the 2024 Irish general election, Byrne is elected to the Dáil. He is subsequently appointed Cathaoirleach of the Joint Committee on Artificial Intelligence.

Byrne is openly gay. As of 2020, he is single and describes politics as “almost like an addiction,” which makes relationships difficult. He lives in Gorey.

In March 2025, Byrne is injured during the theft of his phone in London.