Events from the year 1747 in Ireland.

• Monarch: George II

• 19 January – "Kelly riots" at the Smock Alley Theatre in Dublin when Thomas Sheridan, the proprietor, is in dispute with some gentlemen.^[1]
• 28 February – George Stone, Church of Ireland Bishop of Derry, is elevated to Archbishop of Armagh and Primate of All Ireland (letters patent 13 March), an office he will hold until 1764.^[1]
• 21 April – Edmund Burke sets up Burke's Club, a debating society at Trinity College Dublin, which will become the College Historical Society.^[1]
• 9–14 August – John Wesley pays his first visit to Ireland.^[1]
• 14 August – death of Thaddeus McCarthy, last Roman Catholic Bishop of Cork and Cloyne. The see is separated into the bishopric of Cork and the bishopric of Cloyne and Ross.
• 9 September–20 March 1748 – Charles Wesley pays his first visit to Ireland.^[1]
• 11 September – Daniel O'Reilly is appointed to succeed Ross MacMahon as Roman Catholic Bishop of Clogher, an office he will hold until 1778.

• February – Daniel Delany, Bishop of Kildare and Leighton (1787–1814), founder of Carlow College (1793), Brigidine Sisters (1807) and Patrician Brothers (1808).
• 8 April – William Hales, clergyman and scientific writer (died 1831).
• 27 December – R. Luke Concanen, Dominican priest, consecrated first bishop of the Roman Catholic Diocese of New York (died 1810 in Naples).
• John Dunlap, printer of the United States Declaration of Independence (died 1812 in the United States).
• Andrew Robinson Stoney, adventurer (died 1810 in King's Bench Prison, London).

• 27 May – Bernard MacMahon, Roman Catholic Archbishop of Armagh (born 1680).
• Anthony Duane, businessman in America (born 1679).