Eoin Hayes

Eoin Hayes (born 15 October 1987) is an Irish Social Democrats politician, who has been a Teachta Dála (TD) for the Dublin Bay South constituency since the 2024 general election. Hayes served as a member of Dublin City Council from June 2024 until his election to the Dáil. He was indefinitely suspended from the Social Democrats parliamentary party almost immediately after the election following a controversy over holding shares in Palantir Technologies. He sat as an independent politician during the first session of the 34th Dáil, but was readmitted to the Social Democrats in July 2025.

Hayes was born in Limerick, Ireland. At age six, he moved to Williamsport, Pennsylvania with his family. They returned to Limerick when Hayes was 14, and he completed his Leaving Certificate at Castletroy College.

He studied chemical engineering at University College Cork, after which he completed an MSc in Management at London Business School of the University of London.

Hayes was an intern at Google in 2011 and worked in management consulting in New York City with a boutique firm, the Alexander Group, in 2013. From 2015 to 2017, he worked for the software company Palantir Technologies.

On returning to Dublin in 2017, Hayes founded a consulting firm, Cantillon Labs, which he has led since.

Hayes was elected as president of the Students' Union at University College Cork in 2009. He was active in protesting against the re-introduction of student fees by the government of Fianna Fáil and the Green Party. He was also active in opposing additional fees on students, including printing fees and graduation fees.

In 2012, he campaigned for and was employed by the Barack Obama's re-election campaign as a political deputy in the data team at the headquarters in Chicago.

At the 2024 Dublin City Council election, he was elected as a Social Democrats candidate for the local electoral area of Kimmage–Rathmines.