20th-century Irish businesspeople

Irish businessman, CEO of Ryanair Group

Irish racecar driver

Terrence Thomas Kevin O'Leary, self stylized as Mr. Wonderful, is a Canadian businessman, television personality and actor. From 2004 to 2014, he appeared on various Canadian television shows, including the business news program The Lang and O'Leary Exchange as well as reality show Dragons' Den. O'Leary hosted Discovery Channel's Project Earth in 2008 and has appeared on Shark Tank, the American version of Dragons' Den, since 2009. He made his feature film debut as Milton Rockwell in Josh Safdie's Marty Supreme (2025).

Irish businessman (1936–2007)

Irish activist and businesswoman

UK sports leader (1900-1985)

Irish politician

Irish athlete

Irish aid worker

Irish-Australian airline executive

Irish author

Edward Cecil Guinness, 1st Earl of Iveagh,, known between May 1885 and January 1891 as Sir Edward Cecil Guinness, 1st Baronet, was an Anglo-Irish businessman and philanthropist. A member of the prominent Guinness family, he was the head of the family's eponymous brewing business, making him the richest person in Ireland. A prominent philanthropist, he is best remembered for his provision of affordable housing in London and Dublin through charitable trusts.

miner (1845–1925)

Irish businessman

Irish businessman (1935–2018)

Arthur Edward Guinness, 1st Baron Ardilaun,, styled Sir Arthur Guinness, Bt, between 1868 and 1880, was an Anglo-Irish businessman, politician and philanthropist. He is perhaps best known for giving St Stephen's Green to the Dublin Corporation for public use.

Irish politician

Irish politician

Irish politician and businessman

Gaelic footballer and businessman

Irish racehorse owner

Irish businessman

Irish politician

Irish politician

Irish businessman (1940-2020)

Irish journalist and activist (1869-1936)