List of Famous people born in Leinster, Ireland

John FitzGibbon, 1st Earl of Clare PC (Ire) was Attorney-General for Ireland from 1783 to 1789 and Lord Chancellor of Ireland from 1789 to 1802.

Hercules George Robert Robinson, 1st Baron Rosmead,, was a British colonial administrator who became the 5th Governor of Hong Kong and subsequently, the 14th Governor of New South Wales, the first Governor of Fiji, and the 8th Governor of New Zealand. From June 1859 until August 1896, he was known as Sir Hercules Robinson.

Lawrence Parsons, 4th Earl of Rosse, KP, FRS was a member of the Irish peerage and an amateur astronomer. His name is often given as Laurence Parsons.

Elizabeth Stanhope, Countess of Chesterfield (1640–1665) was the second wife of Philip Stanhope, 2nd Earl of Chesterfield.

Martin O'Donoghue was an Irish Fianna Fáil politician who served as Minister for Education from March 1982 to October 1982, Minister for Economic Planning and Development from 1977 to 1979 and Minister without portfolio in July 1977. He served as a Senator for the Labour Panel from 1983 to 1987. He also served as a Teachta Dála (TD) for the Dún Laoghaire constituency from 1977 to 1982.

Charles William de la Poer Beresford, 1st Baron Beresford,, styled Lord Charles Beresford between 1859 and 1916, was a British admiral and Member of Parliament.

Harriet Bagwell was an Irish philanthropist and promoter of local cottage industry.

Sir Francis Leopold McClintock was an Irish explorer in the British Royal Navy, known for his discoveries in the Canadian Arctic Archipelago. He confirmed explorer John Rae's controversial report gathered from Inuit sources on the fate of Franklin's lost expedition, the ill-fated Royal Navy undertaking commanded by Sir John Franklin in 1845 to be the first to traverse the Northwest Passage.

John Atkinson, Baron Atkinson, was an Irish politician and judge. He was a Lord of Appeal in Ordinary from 1905 to 1928.

Lieutenant Colonel John Augustus Conolly VC, born in Celbridge, County Kildare, Ireland, was an Irish recipient of the Victoria Cross, the highest and most prestigious award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces.