The Irish participating broadcaster, Radio Telefís Éireann (RTÉ), selected its entry through a national final.

The fourth National Song Contest consisted of two semi-finals and a final, held by Radio Telefís Éireann (RTÉ) in its studios in Dublin, hosted by Brendan O'Reilly.

RTÉ opened a submission period for composers to submit songs between 27 October 1967 and 1 January 1968.

Composers had to be Irish-born or live in Ireland and could only submit a maximum of two songs each.

[3] The final was held on 3 March 1968 at the RTÉ studios in Dublin, hosted by Brendan O'Reilly.