Louise O'Reilly is an Irish Sinn Féin politician who has been a Teachta Dála (TD) for the Dublin Fingal constituency since the 2016 general election.
O'Reilly describes herself as being "born a republican socialist" because of her families' involvement in trade unionism. Her grandfather was a shop steward for the Irish Transport and General Workers' Union while her grandmother was one for the Irish Women Workers' Union. Her father Mick O’Reilly was a trade union official as well, and was a member of the Connolly Youth Movement, the youth wing of the Communist Party of Ireland, before joining the Labour Party, to which the union he worked for was affiliated.
O'Reilly herself worked as an organiser with the SIPTU trade union for a decade before her entrance into politics.