|Kingdom of Tyrconnell|
Tyrconnell in the 1450s, prior to its maximum extent
|Capital||Dun na nGall|
|-||d. 464||Conall Gulban (first)|
|-||1602–1607||Rudhraighe Ó Domhnaill (last)|
Tyrconnell or Tirconnell (Irish: Tír Chonaill, meaning "Land of Conall") was political state in north-west Ireland up till 1601. It lay in the area now more commonly referred to as County Donegal, although the Kingdom and later Principality of Tyrconnell was broader than that, including parts of Sligo, Leitrim (present day Republic of Ireland), Tyrone, Fermanagh and a southern part of Derry (currently Northern Ireland). According to Geoffrey Keating, it included the baronies of Carbury (Cairbre, in county Sligo), Rosclogher (Dartrighe in county Leitrim), and Magheraboy (mainly Toorah or Tuath Ratha) and Firlurg (in county Fermanagh). As such it reached roughly a size varying between that of Corsica (8,680 km2), Cyprus (9,251 km2), and Lebanon (10,452 km2).
It was founded in the fifth century by a son of Niall of the Nine Hostages, Conall Gulban, of whom the Cenél Conaill were descended. His descendants of the O'Donnell dynasty ruled the kingdom till the Flight of the Earls in September 1607, which marked the end of the kingdom. Although the Chieftaincy of O'Donnell is extinct, the Chief of the Name is known as The O'Donnell of Tyrconnell, as recognised by the Chief Herald of Ireland, as the legitimate successor in a putative sequence of Chiefs of the Name, and will default to the Duke of Tetuan in Spain in succession to the current Chief, a Franciscan priest, who has no eligible progeny. The Hereditary Seneschal of Tyrconnell (currently vested in a living O'Donnell, who was already ennobled as a Knight of Malta, and who inherited the Seneschalship from his father), survives under the auspices of the Hereditary Great Seneschal or Lord High Steward of Ireland, currently Charles Chetwynd-Talbot, 22nd Earl of Shrewsbury, senior direct descendant of Hugh O'Donnell, 2nd Earl of Tyrconnell, and senior kin of Richard Talbot, Duke of Tyrconnel.
- The History of Ireland, by Geoffrey Keating, D.D. (1580–1644), written in the years prior to 1640, and known in the original Gaelic as "Foras Feasa ar Eirinn" (le Seathrun Ceitinn), published by the Irish Texts Society, London, 1914. Volume IV. See index entry for Tír Chonaill
- The Life of Hugh Roe O'Donnell, Prince of Tyrconnell (Beatha Aodh Ruadh O Domhnaill) by Lughaidh O'Cleirigh. Edited by Fr. Paul Walsh and Colm Ó Lochlainn. Irish Texts Society, vol. 42. Dublin: Educational Company of Ireland, 1948 (original Gaelic manuscript in the Royal Irish Academy in Dublin).
- Annals of the Kingdom of Ireland (Annála Ríoghachta Éireann) by the Four Masters, from the earliest period to the year 1616, compiled during the period 1632–1636 by Brother Michael O’Clery, translated and edited by John O'Donovan in 1856, and re-published in 1998 by De Burca, Dublin.
- Blood Royal – From the time of Alexander the Great to Queen Elizabeth II, by Charles Mosley, published for Ruvigny Ltd., London, 2002 [ISBN 0-9524229-9-9]
- Vicissitudes of Families, by Sir Bernard Burke, Ulster King of Arms, published by Longman, Green, Longman and Roberts, Paternoster Row, London, 1861. (Chapter on O'Donnells, pages 125–148).
- The Fate and Fortunes of the Earls of Tyrone (Hugh O'Neill) and Tyrconnel (Rory O'Donel), their flight from Ireland and death in exile, by the Rev. C. P. Meehan, M.R.I.A., 2nd edition, James Duffy, London, 1870.
- Erin's Blood Royal – The Gaelic Noble Dynasties of Ireland, by Peter Berresford Ellis, Constable, London, 1999, (pages 251–258 on the O'Donel, Prince of Tirconnell).
- Vanishing Kingdoms – The Irish Chiefs and Their Families, by Walter J. P. Curley (former US Ambassador to Ireland), with foreword by Charles Lysaght, published by The Lilliput Press, Dublin, 2004 [ISBN 1-84351-055-3 & ISBN 1-84351-056-1]. (Chapter on O'Donnell of Tyrconnell, page 59).
- A View of the Legal Institutions, Honorary Hereditary Offices, and Feudal Baronies established in Ireland, by William Lynch, Fellow of the Society of Antiquaries, published by Longman, Rees, Orme, Brown, and Green, Paternoster Row, London, 1830 (O'Donnell: page 190, remainder to Earl’s patent).