The Admiral William Brown Cup (in ) is an international rugby union competition contested between and . It was first held on 16 November 2012 at the Aviva Stadium. The trophy is named after Admiral William Brown, the Irish-Argentine born in Foxford, Co Mayo in 1777, who founded the Argentine Navy.
This competition was born after a joint initiative involving the Embassy of Argentina in Dublin, the Embassy of Ireland in Buenos Aires, the Argentine Rugby Union and the Irish Rugby Football Union.
<small>Note: Date shown in brackets indicates when the record was or last set.</small>