The Garda Síochána is the national police and security service of Ireland. It is more commonly referred to as the Gardaí or "the Guards". The service is headed by the Garda Commissioner, who is appointed by the Irish Government. Its headquarters are in Dublin's Phoenix Park.

The Garda Commissioner – officially known as the Commissioner of An Garda Síochána – is the head of the Garda Síochána, the national police force of Ireland. The Garda Commissioner is appointed by the Government of Ireland (Cabinet), on the recommendation of the Minister for Justice. The Commissioner reports to the Minister for Justice, in charge of the Department of Justice, of which the Garda Síochána is a state agency. The Garda Commissioner sits on the Irish Government's National Security Committee (NSC), and is responsible for Ireland's domestic state security apparatus.