Peter David Murphy (21 January 1923 – 3 June 2011) was an Irish radio and television broadcaster, best known as the host of the RTÉ's Cross Country Quiz.

John Murphy (1879–1961) was a farm manager at Huntington Castle, while Julia was a shop assistant in the nearby village of Clonegal.

[citation needed] He was also involved in sport, and competed at minor, junior and senior level inter-county Gaelic football for his native Carlow.

[citation needed] This, together with a distinctive speaking voice, found him in demand as a presenter of Sponsored Radio Programmes, between 1961 and 1979, for nine different companies including: Whelehans of Finglas, Irish Farmers Journal, ACC, Nitrogen Éireann, Bank of Ireland, Associated Livestock Marts, Farming Independent, Hygeia of Galway and Goulding Fertilisers.

This led to the roles of question-master and question-setter (and later on as adjudicator) on the joint RTÉ/BBC production of Cross Country Quiz.