Leader of the Opposition (Ireland)

Leader of the Opposition Ceannaire an Fhreasúra
Incumbent Mary Lou McDonald since 27 June 2020
Term length	While leader of the largest political party not in government
Inaugural holder	Thomas Johnson
Formation	6 December 1922

The Leader of the Opposition (Irish: Ceannaire an Fhreasúra) in Ireland is the politician who, de facto, leads the Parliamentary Opposition in the lower house of the Irish Parliament, Dáil Éireann.

When in the Dáil, the Leader of the Opposition sits on the right-hand side of the Ceann Comhairle and directly opposite of the Taoiseach.

To date there have been 17 Opposition Leaders, 9 of whom have been Taoiseach. The current Leader of the Opposition is Mary Lou McDonald TD of the Sinn Féin party since June 2020.