The Ceann Comhairle is the chairperson of Dáil Éireann, the lower house of the Oireachtas (parliament) of Ireland. The person who holds the position is elected by members of the Dáil from among their number in the first session after each general election. The Ceann Comhairle since 10 March 2016 has been Seán Ó Fearghaíl, Fianna Fáil TD. The Leas-Cheann Comhairle since 23 July 2020 has been Catherine Connolly, Independent TD.

Dáil Éireann is the lower house, and principal chamber, of the Oireachtas, which also includes the president of Ireland and a senate called Seanad Éireann. It consists of 160 members, each known as a Teachta Dála. TDs represent 39 constituencies and are directly elected for terms not exceeding five years, on the system of proportional representation by means of the single transferable vote (PR-STV). Its powers are similar to those of lower houses under many other bicameral parliamentary systems and it is by far the dominant branch of the Oireachtas. Subject to the limits imposed by the Constitution of Ireland, it has power to pass any law it wishes, and to nominate and remove the Taoiseach. Since 1922, it has met in Leinster House in Dublin.