All 13 matches will also be simulcast and available for catch-up on RTÉ.ie. In addition, all of Ireland's games will be broadcast exclusively live on RTÉ Radio.
Mike Miller, Rugby World Cup Limited (RWCL) managing director, said: "RWCL is delighted to be extending its association with RTÉ Sport to broadcast the 2011 Rugby World Cup throughout Ireland.
"RTÉ is recognised as a leading broadcaster of quality sports coverage and with its extensive broadcast experience of ugby and commitment to the game, RTÉ will ensure the perfect platform for RWC 2011 to reach out to an extensive audience across Ireland."
Ryle Nugent, RTÉ Group Head of Sport, said: "We are delighted to have secured these rights to ensure that the Irish public will enjoy live coverage of all of Ireland's games at next year's Rugby World Cup.
"The tournament showcases the best teams in the world and fans can look forward to following the Irish team's progression every step of the way on all of RTÉ's platforms.
"The awarding of these rights to RTÉ is recognition by RWCL of the quality of our sports coverage and we look forward to sharing what is set to be a momentous sporting occasion with the Irish public."