| 16177 | Birr Castle Archives | A-W | 1760-1790 | H/41: 6 envelopes of voluminous letters to Lady Hawk... | The Rosse Papers |
| 16185 | Birr Castle Archives | A-W | 1790-1800 | H/50: 9 envelopes of letters to Lord and Lady Hawke ... | The Rosse Papers |
| 16191 | Birr Castle Archives | A-W | 1790-1797 | H/56: Letters to Lady Hawke from Mrs Anne Wormded, 1... | The Rosse Papers |
| 16200 | Birr Castle Archives | A-W | 1790-1824 | H/111: Small quarto volume, including letters from M... | The Rosse Papers |
| 16738 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1790-1831
1832-1870
1894-1906
1951-1959 | Doon Vestry Minute Books: 1790-1831 1832-1870, with ... | Bolton Library Archive |
| 16860 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1786-1790
1791-1797 | Lismore Estate?Cash Books, Shanbally:1786-17901791-1... | Bolton Library Archive |
| 22982 | Cork City and County Archives | U296 | 1790-1807
1808-1811
1816-1826 | 3 account books:2 January 1790-24 December 1807, for... | Cooper Penrose Papers |
| 5106 | Irish Architectural Archive | 97/84/Box 72 | 1760-1790 | Rent Rolls and Rentals, 1760-1790, 39 items | Castletown Papers |
| 21019 | King's Hospital School | 100-115 | 1790-1794 | 113 Monthly Accounts, 1790 - 1794. | King's Hospital Records |
| 21020 | King's Hospital School | 100-115 | 1779-1790 | 112 Monthly Accounts, 1779 - 1790. | King's Hospital Records |
| 13037 | Limerick Museum | AQNO (1996.0163) | 1790 | Document, legal. Marriage settlement for John Waller... | |
| 3993 | National Archives of Ireland | RLFC3/2/6/179 | 1790
1847 | Incoming Letters, Baronial Sub-Series: Jemima Deane ... | Relief Commission Records |
| 4005 | National Archives of Ireland | | 1790 | Westmoreland Correspondence: Courtown, Lady, to Lady... | Westmoreland Correspondence |
| 4021 | National Archives of Ireland | | c.1675-c.1790. | Accounts, Rentals, Receipts, numbers 1-81, c.1675-c.... | Sarsfield Vesey Papers |
| 4749 | National Archives of Ireland | 1028/4 | 1790-1941 | Miscellaneous: Index to Proceedings of Society, 1790... | Sick and Indigent Roomkeepers Society |
| 4968 | National Archives of Ireland | | 1790
1798 | 1798 Rebellion Papers in the Quit Rent Office Collec... | Quit Rent Office |
| 148 | National Library of Ireland | Ms18500 | 1761-1790 | Copy of answers by Joseph Bonynge, Committee for Ked... | |
| 149 | National Library of Ireland | Ms18501 | 1790 | Report of Judges Robert Hellan and Thomas Kelly to H... | |
| 1529 | National Library of Ireland | Ms2581 | c1790 | Anthology of poems presented to Miss Hart by John Pr... | |
| 1544 | National Library of Ireland | Ms2664 | 1790-1805 | Minutes of meetings of the governors of St Mary's Ch... | |
| 1692 | National Library of Ireland | Ms11491 | 1718-1790 | Rent Rolls of the County Cavan property of Lord Farn... | Farnham Papers |
| 2608 | National Library of Ireland | Mss615-617 | 1756-1790 | Letters of William Robert Fitzgerald, 2nd Duke of Le... | |
| 2693 | National Library of Ireland | Ms10421 | 1790 | Declaration by Amelia and Joseph McVeigh concerning ... | |
| 2880 | National Library of Ireland | Ms511 | 1788-1790 | Accounts of Mary and Richard St George relating to e... | |
| 2896 | National Library of Ireland | Ms8548 | c1790 | Rental of the estate of the Earl of Derby in Countie... | |
| 3014 | National Library of Ireland | Ms9582 | c1790 | Rental of the estate of Ralph Howard, 1st Viscount W... | Wicklow Papers |
| 3599 | National Library of Ireland | Ms12173 | c.1790-1805 | Miscellaneous documents relating to Lord Louth's est... | Louth Papers |
| 2392 | National Library of Ireland | Ms31558 | 1783, 1790 | Homily addressed by [?Eleanor Trant] to her daughtge... | Trant Papers |
| 9165 | National Library of Ireland | Ms13876 | 1790-1801 | Nine letters to Thomas Walton, Kinsale County Cork, ... | |
| 9207 | National Library of Ireland | Ms15360 | c1790-1799 | Includes accounts of Lady Erne with her agents John ... | |
| 9780 | National Library of Ireland | Ms18501 | 1790 | Report of judges Robert Hellen and Thomas Kelly to H... | |
| 1822 | Public Record Office of Northern Ireland | D/2029 | 1790-1931
1400-1975 | Bundle of manuscript notes relating to the Higginson... | |
| 6554 | Public Record Office of Northern Ireland | D/1556/17/4/1-17 | 1776-1790 | Letters, records and papers regarding the apparently... | |
| 6621 | Public Record Office of Northern Ireland | D/1752 | 1790-1897 | 11 documents comprising of testamentary papers of th... | |
| 6758 | Public Record Office of Northern Ireland | D/2133 | c.1790-c.1966 | c.350 documents relating to the Rowan family, County... | |
| 6808 | Public Record Office of Northern Ireland | D/2353 | 1790-1906
1870-1911 | Genealogical table on the Murphy family, c.1790-1906... | |
| 6831 | Public Record Office of Northern Ireland | D/2453 | 1790s-1940 | This miscellaneous collection includes, for example:... | |
| 8382 | Public Record Office of Northern Ireland | T/2572/1 | 1790-1940 | Pedigree of the Bassett family, Inch, County Down, 1... | |
| 7227 | Public Record Office of Northern Ireland | D/3165 | 1790-1815 | This collection includes a bundle of letters from Jo... | Malcolm Papers |
| 7503 | Public Record Office of Northern Ireland | D/530; D/544; D/1429 | c.1790-1798 | Advertisement and miscellaneous papers about busines... | |
| 7765 | Public Record Office of Northern Ireland | MIC/273/3 | 1790-1828 | Microfilmed copies of the miscellaneous corresponden... | Hobart Papers |
| 8003 | Public Record Office of Northern Ireland | T/1466 | 1790-1954 | This collection of 13 documents includes genealogica... | |
| 8017 | Public Record Office of Northern Ireland | T/1505/1 | c.1790 | Genealogical notes relating to the Skipton family, B... | |
| 8248 | Public Record Office of Northern Ireland | T/2176/1 | 1790-1962 | Genealogical notes on the Bassett family, Parish of ... | |
| 8495 | Public Record Office of Northern Ireland | T/2854/1 | 1790-1829 | Copy of a servants' and labourers' account b... | |
| 2284 | RCSI Heritage Collections | | 1718
1743
1767
1783
1790
1886 | Royal College of Surgeons in Ireland Library Catalog... | Royal College of Surgeons in Ireland Library Catalogue |
| 1427 | Religious Society of Friends in Ireland Historical Library | Portfolio 36B | 1776-1790 | Letters: 1 Letters from Sarah R Grubb to Sarah Shac... | Handlists/Portfolio |
| 4203 | Religious Society of Friends in Ireland Historical Library | Deed Box VII/Folder 11:5 | 1790-1832 | Abigail Jaffray,: Reference to above regarding Sycam... | Deeds |
| 23749 | Representative Church Body Library | Ms 517 | 1790-1993 | Minutes, 1790-1993; accounts, 1791-1874, 1822-1924; ... | Kirwan House |
| 11966 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs4183/1-5 | 1790-1864 | Correspondence of the Crampton family, 1790-1864. | Crampton Papers |
| 3636 | UCC Special Collections & Archives | U36 | 1770-1790 | Book of manuscript poetry in English. Many are not a... | |