List of Famous people named Diarmuid

Diarmuid Ua Duibhne or Diarmid O'Dyna, was a demigod, son of Donn and one of the Fianna in the Fenian Cycle of Irish mythology. He is best known as the lover of Gráinne, the intended wife of Fianna leader Fionn mac Cumhaill in the legend The Pursuit of Diarmuid and Gráinne. Among his sons were Donnchadh, Iollann, Ruchladh and Ioruad.

Diarmuid Seton Lawrence was an English television director.

Diarmuid Martin is the retired Roman Catholic Archbishop of Dublin and Primate of Ireland. Martin was ordained a priest in 1969 and represented the Holy See at major United Nations International Conferences before becoming the Archbishop of Dublin in 2004. Martin has dealt with Catholic sex abuse cases in his tenure as Archbishop. On 29 December 2020 Pope Francis accepted Martin's resignation as Archbishop of Dublin and appointed his successor. The former Bishop of Ossory Dermot Farrell was installed as Martin's successor on 2 February 2021.