| 16392 | Armagh Diocesan Archive (RC) | | 1809 | Letters of Most Reverend Dr Reilly, Archbishop of Ar... | Most Reverend Richard Reilly Archive |
| 16870 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1768-1809 | Vestry Minute Book, Relickmurry, 1768-1809, 1 volume... | Bolton Library Archive |
| 16885 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1809-1869
1870-1910
1912-1923 | Vestry Minute Books, Cullen: 1809-1869 1912-1923, wi... | Bolton Library Archive |
| 16939 | Cavan County Archives | GJ/5 | 1809-1817 | c. summer 1809- summer 1817 Presentment book for bar... | Cavan Grand Jury Records |
| 16940 | Cavan County Archives | GJ/4 | 1809-1817 | c. summer 1809- summer 1817 Presentment book for bar... | Cavan Grand Jury Records |
| 16942 | Cavan County Archives | GJ/2 | 1809-1817 | c. summer 1809- summer 1817 County at large presentm... | Cavan Grand Jury Records |
| 19454 | Cloyne Diocesan Archive (RC) | Box C | 1809 | 1791.00/8/1809 Photocopy of Countess of Kingston re... | Bishop Copinger |
| 19455 | Cloyne Diocesan Archive (RC) | Box C | 1809 | 1791.07/1/1809 Photocopy of letter. Bishop Copinger... | Bishop Copinger |
| 13059 | Cork City and County Archives | U116 | 1809-1824 | Correspondence, 22 letters from Philip Ryder to his ... | Tivy Papers |
| 6264 | Cultural Heritage Services Library, Armagh | 338.476771164 | 1809-1825 | 12 volumes of bound, printed yearly reports of the L... | |
| 3437 | Donegal County Archives | CH/BV/9/5/ | 1809-1932 | Not Digitised[?]:788. Warrants, 1809-1810789. Presen... | Donegal Grand Jury Records |
| 12696 | Kildare Local Studies, Genealogy and Archives Department | | 1809-1893 | County Kildare Grand Jury Presentment books, in manu... | Kildare Grand Jury Records |
| 13058 | Kilmainham Gaol Museum | 3BK-1J53-4 | 1809 | Report from the committee appointed to enquire into ... | Catholic Emancipation |
| 21004 | King's Hospital School | 83-99 | 1793-1809 | 88 Agents Accounts, 1793 - 1809. | King's Hospital Records |
| 20025 | Limerick Archives | P1 | 1809-1949 | Ballot Books.21. April 1830 - March 1896.22. May 189... | Limerick Chamber of Commerce |
| 18587 | Maynooth University and St Patrick's College, Maynooth | PP/33 | 1809-1841 | 155 items, 113 of which are letters from Howe Peter ... | The Marquess of Sligo Archive |
| 20185 | Meath Local Studies and Family History Department | Box G/ | 1809 | 6 Deed between Thomas Bligh Brittas Jane Johnson, an... | Mountainstown Documents |
| 21562 | Monaghan County Museum | | 1809-1892 | Nunn Estate (Monaghan), 1809-1892 (335 items) | |
| 11505 | National Archives of Ireland | | 1809 | In the matter of Elizabeth and Edmond Byrne Minors, ... | Byrne Papers |
| 15450 | National Archives of Ireland | 999/20 | 1810-1830
1873-1874
1809-1814
1814-1831 | Parish Register. Plain copy parish register of Killa... | Small Private Accessions |
| 1951 | National Library of Ireland | Mss4742-4746 | c1809 | An unpublished novel, 'Selena' by Mary Tighe, in 5 v... | |
| 1956 | National Library of Ireland | Ms4804 | 1806-1809 | A volume of critical book reviews by Mary Tighe, Apr... | Wicklow Papers |
| 2423 | National Library of Ireland | P2598/N2977 | 1809-1843 | Microfilm: Includes Notebook of Lucy Currie, 1809, a... | Le Fanu Papers |
| 2885 | National Library of Ireland | Ms1395 | 1707-1809 | Typescript copy of the Baptismal and Marriage Regist... | |
| 2319 | National Library of Ireland | Ms711 | 1718
1720
1786
1809
1847
1860-1869 | 'This collection forms part of the O'Casaidh collect... | Cotter family papers |
| 2960 | National Library of Ireland | Ms8876 | 1809-1810 | Letters to Charles Brodrick, Archbishop of Cashel, f... | Brodrick Papers |
| 3050 | National Library of Ireland | Ms9985 | 1802-1809 | Rent Ledger of the estate of William Smythe, 1802-18... | Smythe of Barbavilla Papers |
| 3483 | National Library of Ireland | Ms10824 | 1809-1835 | Fifty eight miscellaneous letters in 5 folders inclu... | Blake Papers |
| 9003 | National Library of Ireland | Ms13645(11-15) | 1809-1850 | Letters to and from Maurice O'Connell, correspondent... | O'Connell Papers |
| 9021 | National Library of Ireland | Ms13744 | 1807-1809 | Two documents including a bill for hearth money due... | |
| 9630 | National Library of Ireland | Ms27373 | 1802-1809 | Letters to James Bryne, mainly on minor financial ma... | O'Bryne Papers |
| 10119 | National Library of Ireland | Ms 19504 | 1809-1816 | Servants' Wage Book of Luke Dillon, 2nd Baron Clonbr... | Clonbrock Papers |
| 10808 | National Library of Ireland | Ms19082 | 1809-1829 | Letters to Mary Leadbeater, mostly from publishers w... | |
| 11069 | National Library of Ireland | Ms19191 | 1809 | Rent Roll of the estate of Viscount Powerscourt in t... | Powerscourt Papers |
| 1807 | Public Record Office of Northern Ireland | D/1995 | 1809-1827 | Diary of Mary A. Folliot, Boyle, County Roscommon, w... | |
| 6317 | Public Record Office of Northern Ireland | CR/8/1-3/ | 1809-1979 | Copies of the papers of the Religious Society of Fri... | Religious Society of Friends Papers |
| 6505 | Public Record Office of Northern Ireland | D/1320/1/3 | 1809 | Circular about provision for widows of officers at E... | Boyle Papers |
| 6995 | Public Record Office of Northern Ireland | D/2480 | 1809-1952 | This collection contains estate, legal, testamentary... | Perceval-Maxwell Papers |
| 7889 | Public Record Office of Northern Ireland | T/1131/1 | 1809 | Diary giving a detailed account of a drive in Irelan... | |
| 8356 | Public Record Office of Northern Ireland | T/2509 | 1750-1809 | Manuscript notes on the Byrne family of Lurgan, Coun... | |
| 7078 | Public Record Office of Northern Ireland | D/2716 | 1809-1827 | 6 letters of Colonel James Kearney, Dublin, his wife... | |
| 7083 | Public Record Office of Northern Ireland | D/2734 | 1809-1942 | 75 documents relating to the Gordon family, Stragull... | |
| 7179 | Public Record Office of Northern Ireland | D/3025 | 1809-1852 | Rathfriland Dispensary account books and reports of ... | Rathfriland Dispensary Records |
| 7267 | Public Record Office of Northern Ireland | D/354/ | 1757-1809 | D/354/1052 Letter from Elizabeth Merrifield, Newry, ... | Mussenden Papers |
| 7585 | Public Record Office of Northern Ireland | DIO/3/27 | 1809-1875 | Treasurer's account books of Mundowey estate, includ... | Diocese of Derry and Raphoe (Church of Ireland) Records |
| 7848 | Public Record Office of Northern Ireland | T/1062/ | 1685-1809 | Copies of the records of the Society of Friends, Lis... | Religious Society of Friends Papers |
| 8482 | Public Record Office of Northern Ireland | T/2798/1/1-7 | 1809-1815 | This collection includes copies of 6 letters from Jo... | |
| 8505 | Public Record Office of Northern Ireland | T/2898/ | 1809 | T/2898/2 Copy of an extract from an autobiographical... | |
| 8507 | Public Record Office of Northern Ireland | T/2901/ | 1809-1899 | T/2901/3/1-17 Copies of 17 emigrant letters from the... | |
| 669 | Religious Society of Friends in Ireland Historical Library | QMI/B7 | 1809-1828 | Women's Meeting Minutes of the Leinster Quarterly Me... | Leinster Quarterly Meetings |
| 1251 | Religious Society of Friends in Ireland Historical Library | MMIII/Z6-7
MMIII/Z6-7 | 1809-1845 | Miscellaneous: MMIII/Z6 Copies of Women's Yearly Me... | Edenderry Monthly Meeting |
| 1252 | Religious Society of Friends in Ireland Historical Library | MMIII/Z4 | 1788-1809 | Miscellaneous: Copies of Women's Yearly Meeting Minu... | Edenderry Monthly Meeting |
| 1270 | Religious Society of Friends in Ireland Historical Library | QMIII/G1-2/Reel 6-7 | 1706-1809 | Sufferings and Tithes: QMIII/G1/Reel 6 Book of Suffe... | Ulster Quarterly Meetings |
| 1335 | Religious Society of Friends in Ireland Historical Library | MMVI/B1-3 | 1809-1899 | Women Meetings: MMVI/B1 Proceedings of County Wexfo... | County Wexford Monthly Meetings |
| 3549 | Religious Society of Friends in Ireland Historical Library | MM/XIIK1/Reel 19 | 1766-1809 | Marriage Certificates, Lisburn Monthly Meeting, 1766... | |
| 3559 | Religious Society of Friends in Ireland Historical Library | LBM/5/34/Reel 23 | 1801-1809 | Letters of Resignation from the Society of Friends, ... | |
| 3577 | Religious Society of Friends in Ireland Historical Library | LGM/5/11/Reel 32 | 1809-1891 | Volume recording acknowledgements of removals out, ... | |
| 2196 | Representative Church Body Library | Ms182 | 1809-1971 | Sunday School Society for Ireland founded in 1809 to... | Sunday School Society for Ireland |
| 10044 | Representative Church Body Library | B3 | 1747-1809 | Account Book, Widow's Fund of the Cathedral, 174... | St Fin Barre's Cathedral Cork Archive |
| 25059 | Royal Irish Academy | 12/S/37a/ | 1809 | 9: Indenture dated 25 August 1809, between Bernard B... | Tew Family Documents |
| 13060 | Sligo Archives Service | | 1809-1897 | County Sligo Grand Jury: Abstract of Presentments at... | County Sligo Grand Jury |
| 10389 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs7634 | 1629-1809 | Gore Wills, 1629-1809. | Arran Papers |
| 10380 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs7582/1-8 | 1798-1809 | Letters of a personal nature from Arthur Gore, 2nd E... | Arran Papers |
| 13033 | University of Galway Archives | LE3 | 1787, 1807-1809 | This collection is concerned with the Grandison esta... | |
| 23320 | Waterford City Archives | P4/ | 1789-1809 | 2: Estate Rent Book index and entry for Waterford co... | The Penrose Family Collection |