| 19116 | Armagh Robinson Library | Volume 3 | 1812
1824 | Returns concerning glebes and schools, listing schoo... | Primate J.G. Beresford Papers |
| 8756 | Ballymoney Library | U/A-333.32 | c.1812 | Extracts from a report on the estates of the heirs o... | |
| 4241 | Church of Ireland Centre | Ms131 | 1812-1818 | Letterbook containing copies of letters regarding th... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 4302 | Church of Ireland Centre | Box 35 | 1812-1853 | Society's Employees, 1812-1853:Serial No 41 Test... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 13065 | Cork City and County Archives | U84 | 1812 | A collection of manuscripts compiled by various auth... | Pim Manuscripts |
| 21908 | Galway Diocesan Archives (RC) | | 1805-1812 | Box 8 Warden Valentine Bodkin papers 1805-1812. | |
| 21910 | Galway Diocesan Archives (RC) | | 1812-1852 | Box 10 Warden Edmund Ffrench, bishop of Kilmacduagh ... | |
| 13064 | Limerick Museum | AQNO (1997.0077) | 1812 | Document, legal. Manuscript counterpart settlement o... | |
| 14113 | Louth County Archives | | 1812-1822 | Ardee and Drogheda Daily Coach Account Book, 1812-18... | |
| 5762 | Maynooth University and St Patrick's College, Maynooth | MCA/14/54 | 1812-80 | Correspondence Charles William Russell (1812-1880), ... | Russell Papers |
| 20617 | Meath Local Studies and Family History Department | Box E/ | 1812 | 5 Statement of condition of Drakestown House, when t... | Mountainstown Documents |
| 8896 | National Archives of Ireland | M6933/5 | 1812 | A fragmentary Rent Book/Ledger, 1812. | Ballyglunin Papers |
| 11506 | National Archives of Ireland | | 1812 | Notebook containing daily expenditure on household g... | Byrne Papers |
| 11529 | National Archives of Ireland | | 1812-1813 | 'Miss Rossiters Pass Book': Rosemount Market... | Byrne Papers |
| 11536 | National Archives of Ireland | | 1812 | Release by Jane Lawless to the executors of Michael ... | Byrne Papers |
| 11537 | National Archives of Ireland | | 1812 | Receipts for legacies from the executors of the will... | Byrne Papers |
| 137 | National Library of Ireland | Ms18451 | 1812-1887 | Papers of David O'Connor Henchy, M P, mainly of a pe... | |
| 2411 | National Library of Ireland | Mss8778-8780 | 1765-1812 | Letters to Revd. Daniel A Beaufort, Collon, County L... | Beaufort Papers |
| 2944 | National Library of Ireland | Mss8778-8780 | 1765-1812 | Correspondence of the Revd. Daniel A Beaufort, Collo... | Beaufort Papers |
| 3048 | National Library of Ireland | Ms9978 | 1812-1825 | Rent Book, Bellew Estate, Mountbellew, County Galway... | |
| 3482 | National Library of Ireland | Ms10822 | 1812-1822 | Letters of Frances Blake to her son, Maurice, 1812-1... | Blake Papers |
| 3509 | National Library of Ireland | Ms10170 | 1812-1843 | Correspondence of members of the Hayman family, Youg... | |
| 3625 | National Library of Ireland | Mss12805-12807 | 1812-1821 | Accounts for rent of the Bohey, County Leitrim, esta... | Leitrim Papers |
| 5013 | National Library of Ireland | Ms32605/1-2 | 1812-1869 | Rents Received: 49 1812-1842 50 1841-1869. | Mendicity Institute |
| 5018 | National Library of Ireland | Ms32610/1-6 | 1812-1963 | Cash Books: 58 7 May 1812-31 October 1833 59 3 No... | Mendicity Institute |
| 6899 | National Library of Ireland | Ms18892 | 1812 | Three letters to John Macnamara, Moher, County Clare... | Stacpoole Kenny Papers |
| 9087 | National Library of Ireland | Ms14284 | 1794-1812 | Rent ledger and miscellaneous accounts of estate of ... | |
| 9685 | National Library of Ireland | Ms27195 | 1812-1825 | Letters from Hely Dutton, landscape designer and sur... | Bellew Papers |
| 9769 | National Library of Ireland | Ms18451 | 1812-1887 | Papers of David Henchy, M P, mainly personal, includ... | |
| 10676 | National Library of Ireland | Ms16928 | c1810-1812 | Drafts of the 9th, 11th and 14th reports of the Comm... | Dr Michael Quane Papers |
| 11060 | National Library of Ireland | Ms18886 | 1812-1828 | Letters, mainly to John Macnamara, Moher, County Cla... | Stacpoole Kenny Papers |
| 7437 | Public Record Office of Northern Ireland | D/4051 | 1812-1907 | The collection comprises of duplicate Gore-Boothe ma... | |
| 7540 | Public Record Office of Northern Ireland | D/856/ | 1812-1884 | D/856/E3/5 and D/856/E3/14 Letters from Jane Rolland... | Sharman Crawford Papers |
| 7862 | Public Record Office of Northern Ireland | T/1089 | c1812-1921 | This collection includes, for example: A copy of a c... | |
| 8390 | Public Record Office of Northern Ireland | T/2593/18-19 | 1812 | 2 letters from Lady Augusta Amelard to Spencer Perce... | |
| 8497 | Public Record Office of Northern Ireland | T/2858 | 1812-1923 | Copies of the correspondence of the Dill family, 181... | |
| 8668 | Public Record Office of Northern Ireland | T/718 | 1812 | A copy of a Quaker declaration of marriage between W... | |
| 8728 | Public Record Office of Northern Ireland | T/951/1 | 1812-1886 | Notes on births and marriages of the Beresford famil... | |
| 2273 | RCSI Heritage Collections | LOAn/3/17 | 1812-1833 | Samuel Labatt, Master of the Rotunda 1814-1821. Fee ... | Labatt's Fee Books |
| 22271 | RCSI Heritage Collections | Arch/7/A-B | 1812-1838 | Arch/7/B/13 Minutes of the proceedings of the manage... | House of Industry & House of Industry Hospitals |
| 840 | Religious Society of Friends in Ireland Historical Library | QMI/H35-42 | 1812-1924 | Schools and Education: QMI/H35 Produce Accounts for... | Leinster Quarterly Meetings |
| 1057 | Religious Society of Friends in Ireland Historical Library | Mss Box 21 | 1812 | Folder 3 Listing of marriage settlement of Robert C... | Handlists: Mss Boxes, Pamphlets Boxes, etc. |
| 3570 | Religious Society of Friends in Ireland Historical Library | MM/XIIIM4/Reel 29 B | 1812-1848 | Marriage Register, Lurgan Monthly Meeting, 1812-1848... | |
| 3580 | Religious Society of Friends in Ireland Historical Library | LGM/5/14/Reel 33 | 1812- c1868 | Accounts of Suffering, Lurgan Monthly Meeting, 1812-... | |
| 4140 | Religious Society of Friends in Ireland Historical Library | Deed Box IX/Folder 12:2 | 1808-1812 | Elizabeth Dawson, widow of John Dawson Coates. Extra... | Deeds |
| 4983 | Religious Society of Friends in Ireland Historical Library | MM/XIVM1/Reel 38 | 1812-1923 | Register of Births, 1812-1923, Grange, near Charlemo... | |
| 8798 | Religious Society of Friends in Ireland Historical Library | LBM/5/25/Reel 22 | 1812-1982 | Burial Register, 1812-1982, Lisburn Monthly Meeting. | |
| 8799 | Religious Society of Friends in Ireland Historical Library | LBM/5/26/Reel 22 | 1812-1981 | Birth Register, 1812-1981, Lisburn Monthly Meeting. | |
| 11121 | Religious Society of Friends in Ireland Historical Library | MM/XVIM3/Reel 42 | 1812-1878 | Richhill Monthly Meeting, Birth Register, 1812-1878,... | |
| 11122 | Religious Society of Friends in Ireland Historical Library | MMXVI M4/Reel 42 | 1812-1920 | Burial Register with index, Richhill Monthly Meeting... | |
| 21482 | Religious Society of Friends, Ulster Quarterly Meeting Archive | | 1812-1929 | Burial certificates for Richill meeting, 1812-1929. | |
| 21495 | Religious Society of Friends, Ulster Quarterly Meeting Archive | | 1812-1854 | Lisburn meeting birth notes, 1812-1854. | |
| 21497 | Religious Society of Friends, Ulster Quarterly Meeting Archive | | 1812-1854 | Lisburn meeting burial notes, 1812-1854. | |
| 22086 | Representative Church Body Library | B5 | 1812-1871 | St Fin Barre's Parish: Church Warden's Books... | St Fin Barre's Cathedral Cork Archive |
| 25097 | Royal Irish Academy | 23/K/53 | 1812 | Letter from Matilda Tone to Catherine Heavyside, 10 ... | Peter Burrows Papers |
| 13066 | Tipperary Museum of Hidden History | AQNO1995.466 | 1812 | Lease, Viscount Lismore to Mary and Michael Walsh, C... | |
| 13067 | Tipperary Museum of Hidden History | AQNO1995.381 | 1812 | Lease, Viscount Lismore to John and Catherine Walsh,... | |
| 10227 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs7307/1-22 | 1804-1812 | Letters of Lady Ann Clements to Austin Cooper, 1804-... | Clements Papers |
| 10423 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs10047/5 | 1812-1820 | Correspondence of Sir Robert Perceval: 1812 1817 181... | Graves Papers |
| 10598 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs3998 | 1812 | Journal of Eliza Phillips, Haverford West, Wales, ma... | Bushe Papers |
| 9863 | UCC Special Collections & Archives | BL/EP/G/1466 | 1812-1939 | Material collected by Christine Chicester for her fa... | Grehan Estate Collection |
| 2083 | UCD Archives | P34 | 1812-1975 | Includes correspondence on personal matters to Willi... | Cowan Papers |
| 24084 | Union Theological College | | 1812 | Catherine Cappe, 'Small tribute to the memory of Mrs... | Union Theological College Pamphlet Collection |
| 18433 | University of Galway Archives | P120 | 1812-2013 | Tim and Máiréad Robinson's archive primarily docum... | Tim Robinson |