Matthew Carthy (born 19 July 1977)[1] is an Irish Sinn Féin politician who has been a Teachta Dála (TD) for the Cavan–Monaghan constituency since the 2020 general election.

He has described the experience of living on the Irish border during the conflict as playing a formative role in shaping his republican political views, and cites hunger strikers Bobby Sands and Kieran Doherty as major influences.

[4] Carthy studied marketing for a year at the Dublin Institute of Technology, where he formed a Sinn Féin college cumann (branch) in 1996.

Former Provisional IRA member Thomas McMahon, who was convicted of the murder of Lord Louis Mountbatten and three others off the coast of Mullaghmore, County Sligo, in 1979, canvassed for Carthy in the elections.

Sligo County Councillor Chris MacManus was nominated to fill Carthy's seat in the European Parliament following his election to the Dáil.