The radio service began on 1 January 1926, while regular television broadcasts began on 31 December 1961, making RTÉ one of the oldest continuously operating public service broadcasters in the world.
Radiovirksomheden begyndte 1. januar 1926, og fjernsynsudsendelserne fik premiere 31. december 1961, hvilket gør RTÉ en af verdens ældste selskaber, der har sendt programmer kontinuerligt.