| 14991 | Armagh Diocesan Archive (RC) | | 1849-1852 | Full lists of these papers are available in the arch... | |
| 16957 | Clare County Archives | | 1849-1922 | Minute Books:October 1849 - May 1850June 1857 - Dece... | Ennis Poor Law Union |
| 13135 | Cork City and County Archives | U62/ | 1849-1854 | 2 Letter from R.F. Geary (?) to his mother from the ... | Johnson Papers |
| 5643 | Galway County Council Archives | GPL/3 | 1849-1886 | Minute Books:1 3 July 1849 - 25 March 18504 21 Janua... | Clifden Poor Law Union |
| 2039 | Kerry Local Studies and Archives Department | BG/73/A/ | 1849-1921 | Dingle Union minute books:1. February 1849 - Decembe... | Dingle Poor Law Union |
| 21899 | Kerry Local Studies and Archives Department | BG/73/AA/ | 1849- | 1. Rough Minute Books May 1849 - December 18492. Rou... | Dingle Poor Law Union |
| 2137 | Leitrim Local Studies Department | BG117/ND/1 | 1849-1853 | Treasurer's Rate in Aid Cast Book 1849-1853 | Manorhamilton Poor Law Union |
| 5534 | Louth County Archives | BG/80/CF/197 | 1849-1857 | Dundalk Union Treasurers Account, 1849 - 1857. | Dundalk Poor Law Union |
| 680 | National Archives of Ireland | BG/40/ | 1849-1859 | Balrothery Poor Law Union Minute Books:BG/40/A1-7 mi... | Balrothery Poor Law Union and Rural District Council |
| 705 | National Archives of Ireland | BG/78/ | 1849-1904 | North Dublin Poor Law Union Minute Books:AA1 Septemb... | North Dublin Poor Law Union and Rural District Council |
| 11501 | National Archives of Ireland | | 1849-1884 | Letters to E.A. Byrne, James Byrne and Mrs Byrne, 25... | Byrne Papers |
| 11502 | National Archives of Ireland | | 1849-1933 | Letters to Mrs Byrne and Mr Edward A. Byrne, Rosemou... | Byrne Papers |
| 15434 | National Archives of Ireland | 99/56/10/56 | 1906
1849-1877 | Papers relating to King's County. W.H. Atkinson marr... | Family and estate records. 1611-1948 |
| 3595 | National Library of Ireland | Ms12164 | 1849-1874 | Rent Ledger of an estate in the Banagher district of... | |
| 6922 | National Library of Ireland | Ms12612 | 1849-1850 | Westport Poor Law Union Minute Book, 10 November 184... | |
| 9085 | National Library of Ireland | Ms14280 | 1849-1870 | Accounts of annunities and subsciptions to charities... | |
| 9121 | National Library of Ireland | Mss14740-14741 | 1849-1851 | Rent Arrears Book of County Clare tenants of Lucius ... | Inchiquin Papers |
| 9263 | National Library of Ireland | Ms15745 | 1849-1892 | Seven autographed letters of C Gavan Duffy, 1849-189... | |
| 9359 | National Library of Ireland | Mss23932-23934 | c1849-1892 | Three Cash Receipts and Payments Books, c1849-1892. | Ormonde Papers |
| 9731 | National Library of Ireland | Ms18246 | 1849-1850 | Account of surveys of holdings in County Longford, s... | Dimond Papers |
| 11599 | National Library of Ireland | Ms12716 | 1849-1895 | Castlebar Poor Law Union Rough Ledger, 1849-1895. | |
| 11602 | National Library of Ireland | Ms5739 | 1849-1850 | Minute book of Newport Union of Poor Law Commissione... | |
| 11913 | National Library of Ireland | Ms12549-12558 | 1849-1855 | Killala Poor Law Union Minute Books: Ms12,549 6 Oct... | Killala Poor Law Union |
| 18835 | Offaly Archives | OH OHS71 | 1849-1853 | Copies of outgoing letters from John V. Brown, clerk... | Parsonstown Union Outgoing Letter-Book |
| 6787 | Public Record Office of Northern Ireland | D/2250/2 | 1849-1886 | 1 volume ledger for Lady Johnson's trust estate, 184... | |
| 6297 | Public Record Office of Northern Ireland | BG/3/ | 1849-1951 | All board of guardian records are closed for 100 yea... | Ballycastle Board of Guardian Records |
| 6759 | Public Record Office of Northern Ireland | D/2137/ | 1849-1866 | This collection includes, for example: D/2137/1/14B-... | |
| 8394 | Public Record Office of Northern Ireland | T/2606 | 1849-c1970 | T/2606/1 12 documents comprising of emigrant letter... | |
| 8492 | Public Record Office of Northern Ireland | T/2850/ | 1849-c.1918 | T/2850/1/6 Copy of a poem on the death of Miss Shann... | |
| 8614 | Public Record Office of Northern Ireland | T/529/ | 1849-1855 | T/529/18 Copy of a list of tenants for whom the land... | |
| 3564 | Religious Society of Friends in Ireland Historical Library | MMXIIIB3/Reel 29A | 1849-1864 | Women's Meeting, Lurgan Monthly Meeting, 1849-1864. ... | |
| 11094 | Religious Society of Friends in Ireland Historical Library | PM/CorIV/B1 | 1849-1854 | Youghal Preparative Meeting, Women's Minutes, 1849-1... | |
| 10045 | Representative Church Body Library | B4 | 1849-1979 | Registers of Readers and Preachers:1849-18531857-186... | St Fin Barre's Cathedral Cork Archive |
| 22038 | St Dympna's Hospital, Carlow | IE DA SDH | 1849-1962 | General Register of Patients:October 1849-December 1... | St Dympna's Psychiatric Hospital, Carlow |
| 24294 | Tipperary County Archives | | 1849-1948 | Index Book to General Minutes Clonmel Corporation:17... | Clonmel Corporation |
| 19803 | Tipperary Studies | | 1849-1869 | Rough Minute Books:October 1849-May 1850March 1851-N... | Tipperary Poor Law Union |
| 22751 | Tower Museum, Derry-Londonderry | | 1849-1927 | Miscellaneous Derry City Council letter books: 1849-... | |
| 10213 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6432 | 1849-1861 | Notes of reading belonging to Catherine Eliza Groves... | Groves Papers |
| 11163 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5097/32-3 | 1849-1851 | Returns of Newmarket tenants to be made monthly tena... | O'Brien Family |
| 11924 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs10435 | c1849-1881 | Correspondence, mainly among members of the Oldham f... | |
| 9917 | Waterford County Archives | BG/Dungn | 1849-1922 | Minute Books recording the proceedings of the Board ... | Dungarvan Poor Law Union |
| 9918 | Waterford County Archives | BG/Dungn | 1849-1870 | Dungarvan Poor Law Union, Rough Minute Books recordi... | Dungarvan Poor Law Union |
| 6024 | Westmeath County Archives Department | | 1849-1922 | Athlone Poor Law Union Minute Books:1849 September -... | Athlone Poor Law Union |
| 19186 | Westmeath County Archives Department | | 1849-1921 | Mullingar Poor Law Union Minute Books:9 August 1849 ... | Mullingar Poor Law Union |
| 19187 | Westmeath County Archives Department | | 1849-1850 | Mullingar Poor Law Union Reports:9 August 1849-28 Fe... | Mullingar Poor Law Union |
| 5871 | Wexford County Archive | | 1849-1929 | Letterbook of Outgoing letters, 1895-1914. Direct L... | Wexford Local Authority |