•
Feidlim Ua Conchobair (died 1265), King of
Connacht •
Uilliam Buí Ó Ceallaigh (died 1381), Taoiseach of
Uí Maine and
Chief of the Name, who hosted the famous feast of 1351 that created the phrase
"Fáilte Uí Cheallaigh" ("an O'Kelly Welcome"), lived in Galey Castle, near
Knockcroghery •
Charles O'Conor (1710–1791), historian and antiquarian of the O'Conor Don family •
Matthew O'Conor Don (1773–1844) historian born in
Ballinagare •
Arthur French, 1st Baron de Freyne (1786–1856), Member of Parliament and landlord of
Frenchpark House •
Sir John Scott Lillie (1790–1868)
CB, decorated
Peninsular War veteran, inventor and political activist in England •
James Curley (1796–1889), Jesuit and astronomer, born in
Athleague •
William Wilde (1815–1876), surgeon, innovator and father of
Oscar Wilde, born in
Castlerea •
Michael Dockry (born 1817), member of the
Wisconsin State Assembly •
Thomas Curley (1825–1904), American Civil War colonel, farmer and
Wisconsin legislator, born in
Tremane, near Athleague •
John Gately Downey (24 June 1827 – 1 March 1894),
seventh governor of California from 14 January 1860 to 10 January 1862 •
Henry Gore-Browne (1830–1912),
Victoria Cross recipient, born in Newtown •
Bernard J. D. Irwin (1830–1917), 1st Recipient of The
Medal Of Honor •
Luke O'Connor (1831–1915), first soldier to receive the
Victoria Cross, born in Hillstreet, near
Elphin •
John Fitzgibbon (1845–1919), Member of Parliament •
William Griffiths (1841–1879), recipient of the Victoria Cross, born in County Roscommon •
Percy French (1854–1920), born in
Tulsk, was a foremost songwriter and entertainer, and water-colour painter • Sir
Owen Lloyd (1854–1941), recipient of the Victoria Cross, born in County Roscommon •
Thomas Heazle Parke (1857–1893, explorer and naturalist, born at Clogher House, Kilmore •
Charlotte O'Conor Eccles (1860–1911) writer, journalist and translator born in the county •
Roderic O'Conor (1860–1940),
impressionist artist of the O'Conor Don Family •
Douglas Hyde (1860–1949), scholar of the Irish language, first
President of Ireland (1938–45), founder of the
Gaelic League during the Revival of the late 19th – early 20th century, born in Castlerea and buried in the Hyde Museum,
Frenchpark •
Aleen Cust (1868–1937), the first female veterinary surgeon in
Ireland or
Great Britain, practised in County Roscommon and is buried in
Roscommon town •
Margaret Cousins (, 1878–1954), educationist and suffragist in India, born in
Boyle •
Edward Flanagan (1886–1948), priest and founder of the orphanage
Boys Town •
Maureen O'Sullivan (1911–1998), Ireland's first international movie star, born in Boyle •
Máire McDonnell-Garvey (1927–2009), Traditional Irish musician born in Tobracken near
Ballaghaderreen •
Brian O'Doherty (1928–2022), artist and
art critic in New York City, born in
Ballaghaderreen •
Albert Reynolds (1932–2014),
Taoiseach, born in
Rooskey •
Nuala Quinn-Barton (born 1952), US film producer, artist and model brought up at Killerr,
Ballintober •
Brian Leyden (born 1960), novelist, short story writer, screenwriter and documentarian of
Arigna •
Luke 'Ming' Flanagan (born 1972), politician and MEP born in Roscommon •
Chris O'Dowd (born 1979), actor and comedian, born in Boyle •
Seamus O'Neill (born 1982 or 1983), Gaelic footballer ==See also==