RTÉ One

RTÉ One (Irish: RTÉ a hAon) is the flagship television channel of Raidió Teilifís Éireann (RTÉ), and it is the most popular and most watched television channel in Ireland. It was launched as Telefís Éireann on 31 December 1961, it was renamed RTÉ Television in 1966, and it was renamed as RTÉ 1 upon the launch of RTÉ 2 in 1978. RTÉ is funded partly by the licence fee; the remainder of the funding is provided by commercial advertising. Because RTÉ is funded partly by the licence fee it shows considerably fewer advertisements than most other channels available in Ireland and Northern Ireland.

RTÉ One is available to 98% of the Irish population in High Definition on the Saorview DTT service. It is carried on all the digital television services in the Republic of Ireland such as Sky Ireland, Virgin Media Ireland and Magnet Networks. It is also available in Northern Ireland via Saorview overspill, the UK Freeview service, satellite provider Sky, and cable provider Virgin Media. The channel is also available online through RTÉ Live.