The IURU organizes the Irish Universities Representative Rugby Team which competes annually on tour and against touring and invitational teams. The Irish Universities has played against full test teams, e.g. against the All Blacks in 1974 and beat the Springboks in 1965 in Thomond Park. Since the advent of professional rugby, test matches against full senior international sides have become a thing of the past, however the IURU continues to arrange international fixtures. In the 2010/2011 Season, the Combined Universities of Ireland will play UCDRFC as part of UCDRFC's centenary celebrations. This game will take place on Friday 5 November 2010 in Belfield, UCD.
The IURU also organizes two domestic tournaments of varying success; The Dudley Cup is the senior inter university competition founded over one hundred years ago with University College Cork taking the most titles. In recent years it is often not completed due to time constrictions placed on the clubs due to AIB League commitments. The initial proposal for the Dudley Cup in 2009/2010 was to play on the weekend of 13 February 2010 in format similar to the Conroy Cup. Unfortunately the inclement weather over the Christmas/New Year period meant that a number of AIL fixtures were rescheduled for the weekend designated and as a result the Dudley Cup in the proposed format had to be abandoned. However a solution was arrived at. Queen's University Belfast had played UCC RFC earlier in the season as part of the AIB Cup. It was agreed by all clubs that this match be considered a Dudley Cup semi-final and that the Colours match between DUFC and UCD RFC be considered the second semi-final. As a consequence and based on the results of the respective fixtures, UCD played QUB in Dublin on 24 April 2010 in the final of the Dudley Cup, with UCD running out eventual winners and retaining the Dudley Cup for the second year in a row. The Dudley Cup in 2010/2011 is being held on Saturday 25 September in College Park in Trinity College, Dublin.
The Conroy Cup is the U-20s level tournament. It is played over a weekend hosted by one of the member universities. It is significantly more successful then the Dudley Cup due to U-20 teams not having AIL commitments. Unlike the Dudley Cup, University College Galway R.F.C. takes part in this competition. The Conroy Cup for season 2009/2010 was held on the weekend of 17-18 October 2009 in UCC. Four of the five Universities competed, Once again the Conroy was fiercely contested and the eventual winners were UCD having beating UCC in the final. In the 2010/2011 season the Conroy Cup is being hosted by UCDRFC on the weekend of the 23/24 October and is a key feature of UCDRFC's centenary celebrations.
The first ever junior intervarsity competition for junior university teams took place on 27 March 2010 and was hosted by NUI Galway. NUI Galway (1st / 2nd XV), UCC RFC (3rd XV) and UCD RFC (4th XV) all competed for the Maughan/Scally Cup, which is named after to former members of UCD RFC who were great supporters of junior rugby. NUI Galway were the eventual winners having beaten UCC RFC and drawing against UCD RFC.