Landed Estates
NUI Galway

Dillon (Loughglynn)

The Dillon family held a large estate on the border of counties Mayo and Roscommon. They were descended from the Norman family who had first become established in county Westmeath. Theobald Dillon of Loughglynn was granted over 4,700 acres by patent in December 1680. The main part of their estate was in county Mayo where they owned extensive lands in the parishes of Aghamore, Annagh, Bekan, Castlemore, Knock, Kilbeagh, Kilcolman and Kilmovee in the barony of Costello. At the time of Griffith's Valuation, Anne McDonnell was leasing over 130 acres from the Dillon estate at Calveagh, barony of Costello. In 1876 Viscount Dillon owned 83,749 acres in county Mayo, 5435 in county Roscommon and 136 in county Westmeath. He sold his estate in counties Mayo and Roscommon, amounting to 93,652 acres, to the Congested Districts' Board on 11 May 1899. The Stricklands were agents for the Dillon estate. In 1828 Jerrard Strickland of Loughglynn was a member of the Grand Panel of county Roscommon.


Name Townland Civil Parish PLU DED Barony County Map Ref
Castlemore Castlemore Castlemore Castlereagh Ballaghaderreen 57 Costello Mayo OSI Ref: M598 948
OS Sheet: 74
Discovery map: 32
Brooklawn Ishlaun Castlemore Castlereagh Ballaghaderreen 57 Costello Galway OSI Ref: M587 935
OS Sheet: 74
Discovery map: 32
Loughglynn Loughglinn Demesne Tibohine Castlerea Loughglinn 59 Frenchpark Roscommon OSI Ref: M637868
OS Sheet: 20
Discovery map: 32
Coolagarry Coolagarry Tibohine Castlerea Loughlglinn 59 Frenchpark Roscommon OSI Ref: M639856
OS Sheet: 20
Discovery map: 32
Palmfield Calveagh Upper Kilbeagh Castlereagh Ballaghaderreen 57 Costello Mayo OSI Ref: G553007
OS Sheet: 63
Discovery map: 32
Lung House Banada Kilcolman Castlereagh Buckill Frenchpark Roscommon OSI Ref: M641938
OS Sheet: 8
Discovery map:

Archival sources

  • Dillon Papers, leases, accounts, rent rolls, correspondence, maps, 19th century plans re Loughglin and other records, 17th-19th centuries. Mss. Dil. XXII; Oxfordshire Record Office
  • County Record Office, Oxfordshire, Dillon Papers, Mss. Dil. XXII. b. 1-9, 13, 16-17, documents re Irish estates of Viscount Dillon, including rent rolls of Costello-Gallen estate and agent’s accounts 1687-91, OS maps, plans re alterations to Loughglin House, a book of leases 1805 and accounts of Mr Strickland the agent in the 1830s. Microfilm p.5312; National Library of Ireland
  • Volume of maps of lands let on estate of Viscount Dillon, Co Mayo 1833-1835. 16.M.3 (1-49); National Library of Ireland
  • 3 volumes of maps of estate of Viscount Dillon in Co Mayo by various surveyors, 1842-75. 16.M.4-6; National Library of Ireland
  • Dillon papers, photograph (1899) of letters patent, Edward III, to Henry Dylan, of manor of Kilkenny West, & confirmation of James I of lands in counties Westmeath, Roscommon & Mayo, 1610. MSS.Dil. XXII,b, 1-2. [microfilm at NLI, p.5312]; Oxfordshire Record Office
  • Letters to Vist. Dillon from his agent, Charles Strickland, on estate matters, 1854-5 & letters from Alfred Markby, 1887 & 1890. Ms.Dil. XXII b.14. [Microfilm copy at NLI, p.5312]; Oxfordshire Record Office
  • Papers relating to Loughglinn including proposed alterations, 19th century & OS maps of Dillon estates in Roscommon, Wexford, Kildare, Mayo & Wicklow. Mss. Dil. XXII 1.1-5. [Microfilm copy at NLI, p.5312].; Oxfordshire Record Office
  • Notes & letters of Harold Dillon relating to Dillon genealogy. [microfilm copy at NLI, p.5312]. ; Oxfordshire Record Office
  • Maps of the Dillon estate in townlands of Carrigan Beg & Carrigan More, Co Roscommon & in Co Westmeath, 1907. 15 A 20 (8-9); National Library of Ireland
  • Dillon Papers. Contact: Mr & Mrs Alec Cobbe [nee Dillon], Hatchlands Park, East Clandon, Surrey. ; Private Possession

Contemporary printed sources

Modern printed sources