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Radio Telefís Éireann (RTÉ) held the national final on 4 February 1979 in Dublin, broadcast on RTÉ 1 and hosted by Mike Murphy. The winner, which was decided by ten regional juries throughout Ireland, was Cathal Dunne, who previously competed in the 1976 Irish National Final, but came 4th, losing out to Red Hurley who performed the song "When".