| 16192 | Birr Castle Archives | A-W | 1791-1800 | H/57: Letters to Lady Hawke from Miss Anne Gibbs, Hu... | The Rosse Papers |
| 16860 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1786-1790
1791-1797 | Lismore Estate?Cash Books, Shanbally:1786-17901791-1... | Bolton Library Archive |
| 16916 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1791-1794
1822-1834 | A second envelope marked 'Lord Lismore's Acc... | Bolton Library Archive |
| 13039 | Cork City and County Archives | U290 | 1791 | Two draft briefs concerning Ann Peard, widow of Chri... | |
| 22967 | Cork City and County Archives | U201/ | 1909-1911
1791 | 4: Newscuttings taken from the Examiner and the... | J.T. Horne Collection |
| 21907 | Galway Diocesan Archives (RC) | | 1783-1791 | Box 7 Warden Augustine Kirwan papers 1783-1791. | |
| 21717 | Kerry Diocesan Archives (RC) | S94 | 1791-1818 | Accounts Book XX, includes details of expenditure, s... | Bishop Charles Sugrue, 1797-1825 |
| 13038 | Limerick Museum | AQNO (0000.4498) | 1791 | Poster, Theatre, two plays about Captain Cook, 31 Ap... | |
| 13040 | Limerick Museum | AQNO (1997.190.07) | 1791 | Document, legal, printed and handwritten: finding th... | |
| 6208 | Linen Hall Library | | 1791-1998 | Belfast Literary Society: 1 box containing 3 bound v... | |
| 4849 | National Archives of Ireland | 1096/3/10 | 1791-1798 | Staff Book with wages, 1791-1798. | Family and Estate Papers of Cliffe/Vigors |
| 4963 | National Archives of Ireland | 43/a-b | 1791
1798 | 1798 Rebellion Papers in the Quit Rent Office Collec... | Quit Rent Office |
| 15529 | National Archives of Ireland | 999/138/10 | 1791-1885 | Abstract of title Anne Mary and William Benjamin Swa... | Small Private Accessions |
| 1482 | National Library of Ireland | Ms1554 | 1791-1804 | Alphabetical list of donators and subscribers to Ple... | |
| 1483 | National Library of Ireland | Ms1555 | 1791-1957 | An apparently complete record of admissions to Pleas... | |
| 1966 | National Library of Ireland | Ms4712 | 1784, 1791-1796 | Petty cash accounts of (Mary Leadbeater of Ballintor... | |
| 2312 | National Library of Ireland | Ms2060 | 1644-1791 | Contains affidavit addressed to the Rt. Rev. Brethre... | Murray family of Mountmurray, County Donegal, papers |
| 2368 | National Library of Ireland | Ms9595 | 1791-1792 | Diary of Anna Maria Townley Balfour detailing a jour... | Townley-Hall manuscripts |
| 2412 | National Library of Ireland | Ms3861 | 1791 | Notes on and exercises in algebra by Elizabeth Putla... | |
| 2877 | National Library of Ireland | Ms409 | 1749-1791 | List of subscriptions to the minister and the charit... | |
| 2932 | National Library of Ireland | Ms8672 | 1791-1823 | Legal documents, 1791-1823, relating to the Briscoe ... | Briscoe Papers |
| 2966 | National Library of Ireland | Ms8901 | 1791-1800
1855 | Rentals and other documents. These include rentals o... | |
| 2971 | National Library of Ireland | Ms8917 | 1791-c1850 | Documents relating to the estates of the Hutchinson ... | Hutchinson Papers |
| 3069 | National Library of Ireland | Ms10172 | 1791-1820 | Includes, among other documents, letters of Mr and M... | Ussher Papers |
| 3460 | National Library of Ireland | Ms10376 | 1786-1791 | Miscellaneous 18th century Balfour letters. These in... | Townley Hall Papers |
| 3587 | National Library of Ireland | Mss12101-12104 | 1791-1900 | Micellaneous records relating to the Female Orphan ... | |
| 9608 | National Library of Ireland | Ms29741(6) | 1791 | Order from Court of Chancery to Colclough tenants to... | Colclough Papers |
| 9609 | National Library of Ireland | Ms29741(9) | 1791 | Custodian of rents (to value of £5 per annum) of Ve... | Colclough Papers |
| 8168 | Public Record Office of Northern Ireland | T/1973/1 | 1791 | Marriage certificate of John Whitfield, County Wickl... | |
| 6655 | Public Record Office of Northern Ireland | D/1831 | 1791-1927 | This collection of 7 documents, includes for example... | |
| 8055 | Public Record Office of Northern Ireland | T/1617/3/7 | 1791 | Copy of a letter from Jane Ryan, Galway, to John Wha... | Faulkner Papers |
| 8406 | Public Record Office of Northern Ireland | T/2627 | 1791-1804 | T/2627/5/U/21 Copy of a memorandum relating to req... | |
| 8470 | Public Record Office of Northern Ireland | T/2761/ | 1791-1792 | c.200 documents comprising of copies of the letters ... | |
| 8512 | Public Record Office of Northern Ireland | T/2919/1 | 1791-1898 | Copies of the correspondence of the Bruce family, Be... | |
| 8665 | Public Record Office of Northern Ireland | T/711/1 | 1791-1792 | Copy of a list of passengers sailing from Newry and ... | |
| 1124 | Religious Society of Friends in Ireland Historical Library | Mss Box 42 | 1791-1826 | Extracts from Mary Leadbeater Journal, edited and ar... | Handlists: Mss Boxes, Pamphlets Boxes, etc. |
| 1441 | Religious Society of Friends in Ireland Historical Library | Portfolio 37B | 1753-1791 | 14 Letter from John Churchman to the Women's Meetin... | Handlists/Portfolio |
| 3537 | Religious Society of Friends in Ireland Historical Library | MM/XXIIC1/Reel 17 | 1791-1838 | Ministers' and Elders' Minutes, Lisburn Monthly Meet... | |
| 3879 | Religious Society of Friends in Ireland Historical Library | Mss Box 55 | 1791-1847 | Testimony to and letters of Mary Grubb, 1791-1826. ... | Handlists: Mss Boxes, Pamphlets Boxes, etc. |
| 3864 | Religious Society of Friends in Ireland Historical Library | Portfolio 46 | 1791-1977 | 1 Letters: 1 Jonathan Grubb of Sudbury to Jane M R... | Handlists/Portfolio |
| 25024 | Royal Irish Academy | 12/T/20/ | 1791-1872 | 7: Miniature of Miss Elizabeth O'Neill, [1791-18... | |
| 10355 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs3957 | 1791-1823 | Servants' Board Wages, 1791-1803 Miscellaneous Hous... | Conolly Papers |
| 17291 | UCC Special Collections & Archives | BL/SC/D | 1736-1791 | 7 items, including the following:3. 20 May 1762... | Delahoide Collection |
| 24083 | Union Theological College | | 1791 | James Stanhouse, 'Religious Instruction of children ... | Union Theological College Pamphlet Collection |
| 18597 | University of Limerick Special Collections and Archives | P/1 (Section B) | 1791-1854 | Section B: John Fraunceis FitzGerald (1791-1854), 24... | The Glin Papers |
| 23322 | Waterford City Archives | P4/ | 1791-1796 | 4: Estate Rent Book, 1 November 1791 - 31 December 1... | The Penrose Family Collection |
| 19302 | Westmeath County Archives Department | | 1791 | 67 Copy of lease Sarah McCarthy to Lewis Moore Mol... | Howard Bury Papers |