| 14294 | Alexandra College | | 1932-1940 | File relating to the Secretarial Department, Reports... | |
| 14299 | Alexandra College | | 1940-1941 | File relating to the Evacuation of English Children ... | |
| 13758 | Armagh County Museum | 1962/174 | 1940 | Rate book, Charlemont electoral division, for the ye... | |
| 16262 | Armagh Diocesan Archive (RC) | | 1940 | Hierarchy - Reports, Communications, etc., includes:... | Cardinal John D'Alton Archive |
| 16350 | Armagh Diocesan Archive (RC) | | 1940 | Political material, includes:Folder number 2, letter... | Cardinal MacRory Archive |
| 16352 | Armagh Diocesan Archive (RC) | | 1940 | Political material, includes:Folder number 15, inclu... | Cardinal MacRory Archive |
| 19157 | Armagh Robinson Library | Volume 1940-1949 | 1940 | An extract from the Ulster Gazette on 'A &q... | Dean Rennison Papers |
| 14652 | Association of Baptist Churches in Ireland | | 1940-1945 | A file of 43 letters, mostly in Spanish, but with so... | Irish Baptist Home and Foreign Mission |
| 14653 | Association of Baptist Churches in Ireland | | 1940 | A file of 43 letters, mostly in Spanish, but with so... | Irish Baptist Home and Foreign Mission |
| 14666 | Association of Baptist Churches in Ireland | | 1940 | Annual reports of the Irish Baptist Foreign Mission,... | Irish Baptist Home and Foreign Mission |
| 14668 | Association of Baptist Churches in Ireland | | 1940- | Annual reports of the Baptist Union of Ireland, 1940... | Irish Baptist Home and Foreign Mission |
| 6232 | Ballymoney Library | | 1820-1940 | Soft bound volume of typescript copies of the out-le... | |
| 20010 | Ballymoney Library | | 1896-1940 | Scrapbook belonging to the playwri... | George Shiels Collection (Ballymoney) |
| 16827 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1906-1940 | Golden parish, Preachers' Books:1906-19261926-19... | Bolton Library Archive |
| 16856 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1861-1940
1957 | Register of Marriages, Clonoulty parish: 1957 1861-1... | Bolton Library Archive |
| 16886 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1911-1940 | Burial Register, Cullen, 1911-1940, with inserts, 1 ... | Bolton Library Archive |
| 14995 | Catholic Girl Guides of Ireland | | 1930-1940 | Folder containing flyers, articles, etc., on similar... | |
| 15017 | Catholic Girl Guides of Ireland | | 1940 | Folder containing invoices of equipment bought by th... | |
| 15018 | Catholic Girl Guides of Ireland | | 1940-1970 | Folder containing correspondence with other organisa... | |
| 15024 | Catholic Girl Guides of Ireland | | 1940-1974 | Five folders containing correspondence relating to t... | |
| 15025 | Catholic Girl Guides of Ireland | | 1940-1970 | Catholic Girl Guides of Ireland, Creditors Ledger, c... | |
| 15041 | Catholic Girl Guides of Ireland | | 1940 | Ring-folder entitled 'General' containing co... | |
| 15045 | Catholic Girl Guides of Ireland | | 1938-1940 | Ring-folder entitled 'Guides, Vol III' conta... | |
| 15048 | Catholic Girl Guides of Ireland | | 1940 | Envelope containing agendas for meetings of Executiv... | |
| 15056 | Catholic Girl Guides of Ireland | | 1940-1960 | Folder containing correspondence relating to events,... | |
| 15061 | Catholic Girl Guides of Ireland | | 1939-1940 | Folder containing general correspondence, 1939-1940. | |
| 15099 | Catholic Girl Guides of Ireland | | 1940-1966 | House Committee Cash Book, Catholic Girl Guides of t... | |
| 4421 | Clare County Archives | 381.1 | 1927 -1940 | Three Daybooks of Roughan's Shop, Ennistymon, 1927-1... | |
| 4430 | Clare County Archives | 371.219 | 1870-1940 | Register of Kilshany Female National School, 1870-19... | |
| 6059 | Clare County Archives | | 1939-1940 | Minutes of Clare County Board, 9 August 1939- June 1... | County Clare Board of Health |
| 6067 | Clare County Archives | | 1939-1940 | Minutes of Clare County Board of Health, Public Heal... | County Clare Board of Health |
| 6069 | Clare County Archives | | 1940-1941 | Minutes of Clare County Board of Health, General Ass... | County Clare Board of Health |
| 6070 | Clare County Archives | | 1940-1942 | Minutes of Clare County Board of Health, General Ass... | County Clare Board of Health |
| 6135 | Clare County Archives | 143-44 | 1940-1969 | Town Commission Personnel, employees: 143 1959 - 19... | |
| 20704 | Clare County Archives | | 1902-1940 | Financial Statement Ledger, 1902 - 1940, 4 volumes. | Kilkee Town Commissioners |
| 13333 | Cork City and County Archives | | 1913-1940 | Minutes of the proceedings of the Committee of Manag... | Youghal Town Records |
| 23820 | Cork City and County Archives | | 1901-1940 | Corporation News Cuttings Books 1901-1940 | Cork City Council Records - Miscellaneous |
| 23821 | Cork City and County Archives | | 1940-1970
1914 | Corporation Year Books 1914, 1940-1970 | Cork City Council Records - Miscellaneous |
| 23294 | Cork City and County Archives | PR6/ | 1940 | 313: 7-9 July 1940 includes a copy letter to M&aacut... | Papers of Seamus Fitzgerald |
| 16944 | Cork Folklore Project | | 1940s-2020 | Interviews (conducted between 2019-2020):CFP_SR00696... | Grattan Street Stories: Memory of Place |
| 13275 | Cork Public Museum | AQNO1986:83/59 | 1900-1940 | A collection of Cork city and county postcards dated... | |
| 13760 | Cork Public Museum | AQNOL1996:141 | 1940-1963 | Statement(?) to the Military Service Pensions Board ... | Nora Wallace Collection |
| 20770 | Cork Public Museum | AQNOL1970:44/ | 1937-1940 | 26 On attendance, expenditure, Heller and D'Alton be... | |
| 18523 | Dublin Diocesan Archives (RC) | AB 7/Charitable, lay orgs | 1940 | Correspondence from the Irish Guild of Catholic Nurs... | Byrne Papers |
| 18542 | Dublin Diocesan Archives (RC) | AB7/Lay Organisations 1 | 1940 | This box also contains some loose letters about the ... | Byrne Papers |
| 3245 | Dún Laoghaire-Rathdown County Council | LA5/ | 1940-1950 | Register of Old Age Pension Claims and questions. Li... | Dún Laoghaire Borough |
| 3246 | Dún Laoghaire-Rathdown County Council | LA5/21 | 1940-1949 | Minutes of the School Attendance Committee responsib... | Dún Laoghaire Borough |
| 3264 | Dún Laoghaire-Rathdown County Council | LA5/ | 1940-1946 | Miscellaneous:644 Material relating to the bombing o... | Dún Laoghaire Borough |
| 19869 | Erasmus Smith Schools Archives | | 1850-1940 | Letters, grazing agreements, ejectments, documents f... | Erasmus Smith Archives |
| 19918 | Erasmus Smith Schools Archives | | 1860-1940 | Audited Registrar's vouchers and High School Bur... | Erasmus Smith Archives |
| 1898 | Fingal County Archive | DPH/1-DHP/18 | 1930-1940 | Dublin Board of Health Signed Minutes:DPH/1 November... | Dublin Board of Health |
| 180 | Irish Film Archive | Our Country | 1940-1949 | 'Our Country': A non fiction film. A short ... | |
| 195 | Irish Film Archive | Holy Ghost Fathers/1940s | 1940-1949 | 'Holy Ghost Fathers/1940s': A film about British Gu... | |
| 211 | Irish Film Archive | Grisewood-McEvoy/1940s | 1940-1949 | Grisewood-McEvoy/1940s: Amateur footage of convent ... | |
| 354 | Irish Film Archive | A School Day Snapshots | 1939-1940 | 'A School Day Snapshots from Church Road, 1939 -... | |
| 5150 | Irish Jesuit Archives | MACE/MCAU/ | 1940-1949 | 34 'Apothecaries Hall Shares: William's Prop... | John MacErlean SJ research on Mother Catherine McAuley (1778-1841). |
| 1365 | Irish Theatre Archive | ITA/131/4/118-141 | 1940-1960 | Ursula Doyle's Early Career, 25 photographs, c.1... | Jimmy O'Dea Collection |
| 2223 | Irish Theatre Archive | ITA/128 | 1940s-1985 | Shelagh Richards, Abbey actress and producer for RT&... | Shelagh Richards |
| 12025 | Kerry Local Studies and Archives Department | SL/B/20 | 1934-1940 | Schedule of particulars of buildings and lands of Ro... | Chute Papers |
| 21855 | Kerry Local Studies and Archives Department | | 1934-1940
1942-1943
1959-1960 | Cash Journals:1934-19361936-19371937-19391939-194019... | Kerry County Council |
| 20859 | Kildare Local Studies, Genealogy and Archives Department | | 1924-1940 | Correspondence Files:1924: Volume 1, 09 January 1924... | Kildare Board of Health Records |
| 20901 | Kildare Local Studies, Genealogy and Archives Department | | 1928-1940 | Special Diet, November 1928 - November 1940 | Kildare County Council |
| 13759 | Kilmainham Gaol Museum | 21LR-1B24-5 | 1940-1943 | Correspondence regarding Miss Stella Archer's pe... | History General |
| 13761 | Kilmainham Gaol Museum | 21LR-1B24-4 | 1940-1981 | Pension files for Miss Stella Archer, 1940 to 1981. | History General |
| 13898 | Kilmainham Gaol Museum | 21PO-1A51-9 | c.1940 | Grace Gifford/Mrs Joseph Plunkett, c.1940. | History General |
| 13899 | Kilmainham Gaol Museum | 21Po-1A51-13 | c.1940s | Photograph of Grace Gifford/Mrs Joseph Plunkett, c.1... | History General |
| 20931 | King's Hospital School | 1-16a | 1912-1940 | 16a General Committee Minutes, 1912-1940. | King's Hospital Records |
| 21001 | King's Hospital School | 83-99 | 1940-1957 | 85 Ledger, 1940 - 1957. | King's Hospital Records |
| 21063 | King's Hospital School | 131-144 | 1940-1950 | 134 Cash Received Book, 1940 - 1950. | King's Hospital Records |
| 21064 | King's Hospital School | 131-144 | 1924-1940 | 133 Cash Received Book, 1924 - 1940. | King's Hospital Records |
| 21161 | King's Hospital School | 232-236A | 1940-1949 | 232B Account Book, stationery, 1940 - 1949. | King's Hospital Records |
| 21195 | King's Hospital School | 254-281 | 1890-1940
1960 | 263 Admission for 1890 - 1940. Numbered 1-909 and ap... | King's Hospital Records |
| 14476 | Laois Local Studies | | 1936-1940 | The collection includes images of pupils, staff and ... | Glen Ban School Collection |
| 21610 | Laois Local Studies | B/ | 1940 | 69. Half-Yearly General Consolidated Account Book:69... | Laois County Council |
| 21612 | Laois Local Studies | B/ | 1940-1945 | 70. Account Book, 1940-1945. | Laois County Council |
| 21622 | Laois Local Studies | C/ | 1938-1940 | 79. Receipts Book, Financial Book, 1938-1940. | Laois County Council |
| 21623 | Laois Local Studies | C/ | 1940 | 80. Financial Statement and Expenditure Book, 1940. | Laois County Council |
| 21635 | Laois Local Studies | B2/9/ | 1943-1944
1940
1942 | Rate Book: 107. 1940-41 108. 1942-43. 109. Rate Book... | Laois Local Authority Records |
| 21653 | Laois Local Studies | 273-281 | 1940 | 275. Consolidated Expenditure Book, Public Assistanc... | Laois Local Authority Records |
| 115 | Limerick Archives | P15 | 1848-1940 | Bundle of receipts of three generations of the Mulca... | Mulcahy Papers |
| 121 | Limerick Archives | P14 | 1872-1940 | Box 2 of these papers include the following:4. Jean ... | Monteagle Papers |
| 14491 | Mayo Local History Department | | 1940-1967 | Scrap Book containing advertisements, 1940-1967 | Mayo County Council |
| 14531 | Mayo Local History Department | | 1940-1989 | Administrative Files, 1940s-1980s, includes Road Fil... | Castlebar Urban District Council |
| 14540 | Mayo Local History Department | | 1940-1970 | Administration files relating to housing, sanitary s... | Ballina Urban District Council |
| 14556 | Mayo Local History Department | | 1840-1940 | Includes images from Mayo; for example, a photo of a... | Sexton Photographic Collection |
| 14558 | Mayo Local History Department | | 1870-1940 | The collection is comprised of photographs depicting... | Wynne Photographic Collection |
| 5782 | Meath Local Studies and Family History Department | UDC/I/C/ | 1940-1952 | Registers:North and South District, year ended:14 31... | Navan Urban District Council |
| 5793 | Meath Local Studies and Family History Department | UDC/I/D/ | 1940-1952 | Loans Miscellaneous:111 1952 Statement of the balanc... | Navan Urban District Council |
| 20259 | Meath Local Studies and Family History Department | FJC | 1940-1953 | Cash Receipts, January 1940 - October 1953. | F. and J. Clayton Company Records |
| 20262 | Meath Local Studies and Family History Department | FJC | 1940-1953 | Order Book, January 1940-October 1953. | F. and J. Clayton Company Records |
| 20329 | Meath Local Studies and Family History Department | | 1938-1940 | Repayment of Maintenance Account Book Register numbe... | Meath County Board of Health |
| 20353 | Meath Local Studies and Family History Department | UDC/I/G/ | 1936-1940 | Townparks, Works Records 13 - February 1936 - August... | Navan Urban District Council |
| 20355 | Meath Local Studies and Family History Department | UDC/I/G/ | 1937-1940 | 15 - 1937, August 1939 -1940. Reference to contract ... | Navan Urban District Council |
| 20376 | Meath Local Studies and Family History Department | UDC/I/G/ (Individual Houses) | 1940-1948 | 38 1940-1948. File concerns proposal of Mr Christoph... | Navan Urban District Council |
| 20377 | Meath Local Studies and Family History Department | UDC/I/G/ (Individual Houses) | 1940 | 39 c.1940s. Architectural plan of proposed new bunga... | Navan Urban District Council |
| 20378 | Meath Local Studies and Family History Department | UDC/I/G/ (Individual Houses) | 1940 | 40 c.1940s Specification and general conditions for ... | Navan Urban District Council |
| 20379 | Meath Local Studies and Family History Department | UDC/I/G/ (Individual Houses) | 1940 | 41 1940s. Outline specifications of work to be done ... | Navan Urban District Council |
| 20383 | Meath Local Studies and Family History Department | UCD/I/G | c.1940 | 45 c.1940s. Copy of memorandum by the Minister for L... | Navan Urban District Council |
| 20410 | Meath Local Studies and Family History Department | UDC/I/G/ | 1940 | Housing Applications (Correspondence):74 c.1940s. 4 ... | Navan Urban District Council |
| 20411 | Meath Local Studies and Family History Department | UDC/I/G/ | 1938-1940 | Repairs to Artisan Dwellings, Expenditure and Works ... | Navan Urban District Council |
| 20422 | Meath Local Studies and Family History Department | UDC/I/G/ | 1940 | Repairs to Artisan Dwellings, Expenditure and Works ... | Navan Urban District Council |
| 20437 | Meath Local Studies and Family History Department | UDC/I/G/ | 1938-1940 | 123 August 1938, August 1939 - May 1940. Application... | Navan Urban District Council |
| 20438 | Meath Local Studies and Family History Department | UDC/I/G/ | 1939-1940 | Operation of Small Dwelling Acquistion Acts:124 Sept... | Navan Urban District Council |
| 20442 | Meath Local Studies and Family History Department | UDC/I/G/ | 1940 | Operation of Small Dwelling Acquistion Acts:Demoliti... | Navan Urban District Council |
| 20455 | Meath Local Studies and Family History Department | UDC/I/G/ | 1938-1940 | Individual Properties, Earl of Essex Estate:141 Febr... | Navan Urban District Council |
| 20456 | Meath Local Studies and Family History Department | UDC/I/G/ | 1938-1940 | Individual Properties, Earl of Essex Estate:142 Augu... | Navan Urban District Council |
| 20568 | Meath Local Studies and Family History Department | UDC/I/H/ | 1921
1922
1926
1930
1937
1940 | Health, Sub-Sanitary Officers: 11 October, 1921-May... | Navan Urban District Council |
| 21231 | Meath Local Studies and Family History Department | UDC/I/J/ | 1939-1940 | Waterworks Sewerage, Reports and Inspections, Specia... | Navan Urban District Council |
| 21232 | Meath Local Studies and Family History Department | UDC/I/J/ | 1909
1924-1940 | Waterworks Sewerage, Extension of System, Works Reco... | Navan Urban District Council |
| 21234 | Meath Local Studies and Family History Department | UDC/I/J/ | 1933-1940 | Waterworks Sewerage, Extension of System, Works Reco... | Navan Urban District Council |
| 21244 | Meath Local Studies and Family History Department | UDC/I/J/ | 1939-1940 | Waterworks Sewerage, Extension of System, Works Reco... | Navan Urban District Council |
| 21251 | Meath Local Studies and Family History Department | UDC/I/K/ | 1924-1940 | General Works and Services, Electricity and Public L... | Navan Urban District Council |
| 21256 | Meath Local Studies and Family History Department | UDC/I/K/ | 1946-1948
1940 | General Works and Services, Road and Streets.Corresp... | Navan Urban District Council |
| 21263 | Meath Local Studies and Family History Department | UDC/I/K/ | 1939-1940 | General Works and Services, General and Miscellaneou... | Navan Urban District Council |
| 21272 | Meath Local Studies and Family History Department | UDC/I/L/ | 1940 | Benefit Services, Allotments, Applications and Relat... | Navan Urban District Council |
| 21285 | Meath Local Studies and Family History Department | UDC/I/L/ | 1940 | Benefit Services, Allotments, Supplies: 25 1940. All... | Navan Urban District Council |
| 21286 | Meath Local Studies and Family History Department | UDC/I/L/ | 1940-1941 | Benefit Services, Allotments, Supplies: 26 October 1... | Navan Urban District Council |
| 21316 | Meath Local Studies and Family History Department | UDC/I/L/ | 1939-1940 | Benefit Services, Operation of Scheme: 30 November 1... | Navan Urban District Council |
| 21317 | Meath Local Studies and Family History Department | UDC/I/L/ | 1940 | Benefit Services, Operation of Scheme: 31 February -... | Navan Urban District Council |
| 22814 | Methodist Historical Society of Ireland | | 1940 | Black and white framed photograph of women seated in... | |
| 22823 | Methodist Historical Society of Ireland | | 1920-1940 | Armagh Methodist Circuit Records: 1920-1940 | |
| 21573 | Monaghan County Museum | | 1867-1888
1940-1983 | School Registers, CBS Monaghan, 1867-1888, 1940-1983 | |
| 1716 | National Archives of Ireland | G3747-1936 | 1936-1940 | Enquiry by Miss D. Pollock, Cliftonville, Belfast, r... | Department of Agriculture |
| 1718 | National Archives of Ireland | L4135-1939 | 1939-1940 | Application by Mrs A Barton, Urlingford, County Kilk... | Department of Agriculture |
| 1720 | National Archives of Ireland | L3368-1939 | 1939-1940 | Proposed importation of pigs, Mrs J. Bellingham, Mul... | Department of Agriculture |
| 3743 | National Archives of Ireland | L3659-1939 | 1939-1940 | Mrs A. Bartan, Urlingford, County Kilkenny, Irish Dr... | Department of Agriculture |
| 3745 | National Archives of Ireland | L3100-1939 | 1939-1940 | Mrs A. Bartan, Urlingford, County Kilkenny, relating... | Department of Agriculture |
| 3830 | National Archives of Ireland | F063/0023/40 | 1940 | Department of Finance, Finance File, 1940. F063/0023... | Department of Finance |
| 3311 | National Archives of Ireland | BG111/FNB/ | 1929-1940 | Lismore Poor Law Union, Porter's Books, Officers... | Lismore Poor Law Union |
| 4673 | National Archives of Ireland | 228/14 | 1940 | Case of a Miss Kathleen Hayden temporarily resident ... | Department of Foreign Affairs |
| 4674 | National Archives of Ireland | 229/37 | 1940 | Communications from Countess Dunin Markiewicz who wi... | Department of Foreign Affairs |
| 4680 | National Archives of Ireland | 239/102 | 1940-1941 | Death of Lady Isobella Annie Dudgeon, 1940-1941. | Department of Foreign Affairs |
| 4720 | National Archives of Ireland | | 1940-1945 | National School Registers: Roll No. 17164 County Ker... | Department of Education |
| 4884 | National Archives of Ireland | S001/0010/32 | 1940 | File relating to the Gaeltacht industries concerning... | Department of Finance |
| 4899 | National Archives of Ireland | OC/146 | 1919
1940 | A Dáil Question by J. Everett concerning a Co... | Department of Industry and Commerce |
| 4913 | National Archives of Ireland | Jus8/837 | 1940 | Mother Superior, San Retraite Convent, Cork regardin... | Department of Justice |
| 5264 | National Archives of Ireland | s13311A | c.1940 | Insanity as a defence against criminal charges propo... | Department of An Taoiseach |
| 11347 | National Archives of Ireland | 202/949 | 1940 | Passport Application, Miss Maeve Mulchay, 1940. | Department of Foreign Affairs |
| 11348 | National Archives of Ireland | 202/1001 | 1940 | Employment of Stepanka Mrazkova, a Czechoslovak, by ... | Department of Foreign Affairs |
| 11997 | National Archives of Ireland | S12117B | 1940-1943 | File on Family Allowances 1940-1943, includes: Legis... | Department of An Taoiseach |
| 12219 | National Archives of Ireland | 98/17/1/5 | c.1940-c.1970 | Irish Housewives Association, Stationery: 1940s-1970... | Irish Housewives Association (Hilda Tweedy Papers) |
| 12238 | National Archives of Ireland | 98/17/8 | 1940-1959 | Non-documentary material, 1940s and 1950s: Irish Hou... | Irish Housewives Association (Hilda Tweedy Papers) |
| 15258 | National Archives of Ireland | 2002/30 | 1925-1940 | National School records for Synge Street, Dublin. | National Schools, Private Accessions |
| 15268 | National Archives of Ireland | 2002/83 | 1940-1983 | National School records for St Louis' Rathmines, Dub... | National Schools, Private Accessions |
| 5593 | National League of the Blind of Ireland | | 1940 | Minute Book of the first decade of this century. Co... | |
| 967 | National Library of Ireland | Ms11377 | 1916-1940 | Letters of Jack Plunkett to his parents, 1916-1917; ... | Count Plunkett Collection |
| 2458 | National Library of Ireland | Mss922-941 | 1939-1940 | Typescript copy of the minutes of evidence and memor... | Commission of Vocational Organisation |
| 2558 | National Library of Ireland | Mss11375-11376 | 1877-1940 | About one hundred and ten letters to Countess Plunke... | Count Plunkett Collection |
| 3490 | National Library of Ireland | Mss10902-10903 | c1900-1940 | Literary remains of Christinia M Doyle and c75 lette... | |
| 9248 | National Library of Ireland | Ms15605 | 1940 | Typescript copy of `Noneen and Jimmy: a wonder story... | |
| 9393 | National Library of Ireland | Mss24233-24238 | c1940-1950 | Typescript copies of plays by Blanaid Salkeld: `Over... | Le Brocquy Papers |
| 9747 | National Library of Ireland | Ms18342 | 1935-1940 | Letters to Gallagher from Mary F. McWhorter, Ladies&... | Frank Gallagher Papers |
| 9755 | National Library of Ireland | Ms18367 | 1939-1940 | Documents relating to the visit of Gallagher to the ... | Frank Gallagher Papers |
| 10085 | National Library of Ireland | Ms16204 | c1900-1940 | Sketchbook of Ivy Little with sketches and autograph... | |
| 10778 | National Library of Ireland | Ms19709 | 1940 | Researches into the ancestry of the composer, John F... | |
| 10822 | National Library of Ireland | Ms18822 | c1936-1940 | Interview text and biographical notes by Mrs Czira o... | Mrs Sydney Czira Papers |
| 10824 | National Library of Ireland | Ms18823 | c1924-1940 | Texts of 2 series of broadcasts by Mrs Czira, c1928-... | Mrs Sydney Czira Papers |
| 10835 | National Library of Ireland | Ms21176 | 1939-1940 | Letters from Joe Clarke, mainly from his daughter, E... | Joe Clarke Papers |
| 10852 | National Library of Ireland | Ms21257 | [?1940] | Typescript account by Nellie Gifford Donnelly of the... | Frank Gallagher Papers |
| 10853 | National Library of Ireland | Ms21258 | [?1940] | Typescript essay on social welfare in ancient Irelan... | Frank Gallagher Papers |
| 10886 | National Library of Ireland | Ms21597 | 1940 | Two copies, in the hand of Grace Plunkett, of a poem... | Grace Plunkett Papers |
| 11027 | National Library of Ireland | Ms17547 | 1940 | Letters to McGarrity, 1940, with other documents, co... | Joseph McGarrity Papers |
| 13209 | National Library of Ireland | Ms10201 | 1880-1940 | Letters to Sarah Purser from, among others, Lady Gre... | Sarah Purser Papers |
| 11991 | National Library of Ireland | Ms930/volume 9 | 1940 | Minutes of Evidence of the Commission on Vocational ... | |
| 11992 | National Library of Ireland | Ms 941/volume 20 | 1910
1939
1940 | Document number 196 Memorandum of Irish Country Wome... | |
| 11993 | National Library of Ireland | Ms 941/volume 20 | 1940 | Document 200 Memorandum, 15 November 1940, submitted... | |
| 86 | National Maternity Hospital | H/10 | 1940-1954 | House Committee, Agenda Book, April 1940-September 1... | |
| 468 | National Maternity Hospital | NMH/74 | 1934-1940 | Private Ledger containing details of Capital Account... | |
| 1743 | National Maternity Hospital | AR/4 | 1931-1940 | Annual Report of the National Lying-In Hospital, Jan... | |
| 5426 | Newtown School, Waterford | AB/4 | 1939-1940 | Evacuation Plans, 1939-1940. | |
| 5458 | Newtown School, Waterford | BB/15 | c1940-1990 | 'Newtown Review', c1940-c1990. | |
| 5474 | Newtown School, Waterford | D/3 | 1930-1940 | Collection of 1920s photographs. | Photographs |
| 14727 | North Down Museum | | 1874-c.1940 | 5 files of c.1500 photographs, mainly of the County ... | |
| 19775 | North Down Museum | | c.1940-1947 | The collection includes, for example:A group photogr... | Pat Hudson Photographic Collection |
| 18863 | Offaly Archives | OCL BUDC30/7/1-2 | 1940-1967 | 2 Rent collection books -
BUDC30/7/1: March 1940 ... | Records of Birr Urban District Council |
| 18988 | Offaly Archives | OCL P44 | 1863-c.1940 | 3 bound volumes. Rental ledgers relating to the esta... | Rental Ledgers of the Cox Estate, Clara |
| 21460 | Police Museum (PSNI) | | 1930-1940 | 1 file, labelled 'Policewomen - Filling the position... | |
| 1812 | Public Record Office of Northern Ireland | D/2004 | 1727-1940 | The Ross of Bladensburg papers consist of c.1500 doc... | Ross of Bladensburg Papers |
| 1826 | Public Record Office of Northern Ireland | D/2035 | 1891
1934-1940 | This collection includes several testamentary papers... | |
| 6551 | Public Record Office of Northern Ireland | D/1525 | 1940-1950 | Records of the Nursery Centre Committee, 1940-1950. | |
| 6588 | Public Record Office of Northern Ireland | D/1680 | c1940 | Genealogical table of the Carson family, Ballymoney,... | |
| 6658 | Public Record Office of Northern Ireland | D/1840/1 | 1940 | Photograph of members of Larne Nursing Society, with... | |
| 8178 | Public Record Office of Northern Ireland | T/1994/1 | 1800-1940 | Copy of the genealogy of the Kidd family, Armagh, Co... | |
| 6327 | Public Record Office of Northern Ireland | D/1046/541 | 1932-1940 | Papers in divorce suit, Lily Chambers of Tullyraine,... | Heron and Dobson Papers |
| 8382 | Public Record Office of Northern Ireland | T/2572/1 | 1790-1940 | Pedigree of the Bassett family, Inch, County Down, 1... | |
| 6507 | Public Record Office of Northern Ireland | D/1326/ | 1886-1940 | D/1326/7/3 Receipts, vouchers, correspondence, case ... | |
| 6546 | Public Record Office of Northern Ireland | D/1512 | c.1940-c.1955 | General notes on the Bullick family, c.1656-c.1955 a... | |
| 6566 | Public Record Office of Northern Ireland | D/1621 | 1866-c.1940 | c.100 documents relating to the records of Island Sp... | |
| 6625 | Public Record Office of Northern Ireland | D/1759 | c1654-1940 | This collection comprises of c100 documents. The ma... | |
| 6829 | Public Record Office of Northern Ireland | D/2451 | 1923-c.1940 | This collection includes: A photograph of the Duches... | Sir Charles Blackmore Papers |
| 6831 | Public Record Office of Northern Ireland | D/2453 | 1790s-1940 | This miscellaneous collection includes, for example:... | |
| 7032 | Public Record Office of Northern Ireland | D/2606 | 1925-1940 | This miscellaneous collection includes: A history of... | |
| 7059 | Public Record Office of Northern Ireland | D/2663 | 1863-1940 | 86 volumes relating to the Irish Temperance League, ... | Irish Temperance League Papers |
| 7092 | Public Record Office of Northern Ireland | D/2758/3 | 1914-1940 | Papers, letters, diaries of Miss G. Delap Stevenson,... | |
| 7110 | Public Record Office of Northern Ireland | D/2802 | 1870-c1940 | This collection of c325 Mayne Reid papers includes: ... | |
| 7195 | Public Record Office of Northern Ireland | D/3070 | c.1911-c.1940 | Minutes books of the Northern Drama League, 1929-193... | |
| 7241 | Public Record Office of Northern Ireland | D/3328 | 1819-c.1940 | This miscellaneous collection of 11 documents includ... | |
| 7329 | Public Record Office of Northern Ireland | D/3722 | 1940-1946 | 14 files and volumes and c.30 documents relating to ... | |
| 7363 | Public Record Office of Northern Ireland | D/3823 | 1891-1940 | 3 volumes and 1 bundle of records relating to Downsh... | |
| 7391 | Public Record Office of Northern Ireland | D/3897 | 1723-c1940 | 67 documents comprising of correspondence and relate... | |
| 7459 | Public Record Office of Northern Ireland | D/4096 | 1940-1991 | 84 volumes of records of the Northern Ireland Counci... | |
| 7537 | Public Record Office of Northern Ireland | D/847/25/13 | 1940-1941 | Papers about claim of Miss Mary McKenna, Cabragh, Du... | Longfield, Kelly and Armstrong Papers |
| 7802 | Public Record Office of Northern Ireland | MIC/637 | 1600-1940 | Microfilmed copies of c.100 Presbyterian Church Regi... | |
| 8156 | Public Record Office of Northern Ireland | T/1946/1 | 1066-1940 | Genealogical chart showing the descent of the Rea fa... | |
| 8208 | Public Record Office of Northern Ireland | T/2068/1 | 1900-1940 | Pedigree of the Armstong and Stokes family, Belfast,... | |
| 8216 | Public Record Office of Northern Ireland | T/2093 | 1793-c.1940 | Volume of c.200 copies of letters of the Irwin Famil... | |
| 8340 | Public Record Office of Northern Ireland | T/2466/2-3 | 1760-1954
1655-1940 | Pedigree of the Reid family, Drumgaw, County Armagh,... | |
| 8354 | Public Record Office of Northern Ireland | T/2506 | 1600-1940 | Genealogical notes and family pedigrees relating to ... | |
| 8708 | Public Record Office of Northern Ireland | T/883/1 | 1666-1940 | Pedigree of the Tisdall family of Mount Tisdall, Cou... | |
| 21481 | Queen's University Belfast Special Collections and Archives | MS74 | c.1940 | MS 1/267 O’Connor, Patricia, pseud. The sparrows f... | QUB Miscellaneous Manuscripts |
| 2276 | RCSI Heritage Collections | | 1940 | Royal College of Surgeons in Ireland, Ladies' Ho... | |
| 856 | Religious Society of Friends in Ireland Historical Library | P410 | 1940-1949 | Young Friends' Conference in Blackrock in 1940s. | Photographic Collections |
| 1222 | Religious Society of Friends in Ireland Historical Library | P416 | 1940-1947 | Young Friends: Filing Cabinet 3 Junior Yearly Meeti... | Photographic Collections |
| 22380 | Religious Society of Friends, Cork | | 1846-1940 | Register of Marriages, Cork Meeting, c.1846-1940, in... | |
| 23552 | Representative Church Body Library | RCBL MS 749 | 1940-1945 | Conference Sub-Committee Minutes, 21 February 1940-1... | Mothers' Union Collection |
| 4114 | Royal Irish Academy | 24/D/39 | 1940 | Folder I Typed enclosures concerning D'Alton fam... | D'Alton, Richard, Family |
| 25000 | Royal Irish Academy | | 1940 | Catalogue of Irish Manuscripts in the Royal Irish Ac... | |
| 24940 | Royal Irish Academy of Music | | 1937-1940 | 26: 6 January 1937-18 December 1940, on attendance, ... | |
| 24974 | Royal Irish Academy of Music | 1120/16 | 1940-1951 | 6: no date, air raid precaution notes, about gases, ... | |
| 22503 | Royal Victoria Hospital, Belfast | | 1915
1920-1940 | Soft bound volume of photographs, including, for exa... | |
| 22668 | Services Industrial Professional Technical Union (SIPTU) | | 1940 | Fermoy Branch:Branch register, 1940 | Irish Transport and General Workers Union |
| 11883 | Sligo Archives Service | Shelf B | 1921-1940 | Sligo Borough Rate Books:1921-1922 east ward1921-192... | |
| 11884 | Sligo Archives Service | Shelf A | 1940-1949 | Sligo Borough Rate Books:1940-1941 east ward (2)1940... | |
| 22687 | South Eastern Education and Library Board Local History Collection | | 1934-1940 | Cuttings relating to Members of the Parliament of No... | Local Studies Collection |
| 22005 | St Brigid's Hospital, Ballinasloe | | 1940 | Sworn Enquiry at Ballinasloe Mental Hospital, Doctor... | Ballinasloe District Lunatic Asylum |
| 21989 | St Canice's Hospital, Kilkenny | | 1845-1857
1940-1950 | Case-Book:August 1845-May 1857c.1940-c.1950. | St Canice's District Lunatic Asylum |
| 21997 | St Canice's Hospital, Kilkenny | | 1940-1951 | Financial Statement Books:October 1940-April 1951 | St Canice's District Lunatic Asylum |
| 12111 | St Louis' Heritage Centre | MCG12/GB30-MCG13/GB30 | 1940
1966 | Photographs relating to Mother Columbanus Greene, Mo... | |
| 24290 | Tipperary County Archives | | 1875-1940 | File of Returns of Officials and Members, 1875-1940. | Clonmel Corporation |
| 22762 | Tower Museum, Derry-Londonderry | | c.1930-c.1940 | Black and white photograph of City Factory female em... | |
| 22763 | Tower Museum, Derry-Londonderry | | c.1930-c.1940 | Black and white photograph of women outside the Cast... | |
| 22764 | Tower Museum, Derry-Londonderry | | c.1940 | Black and white photograph of women wearing gas mask... | |
| 22765 | Tower Museum, Derry-Londonderry | | c.1930-c.1940 | Black and white photograph of women workers outside ... | |
| 22783 | Tower Museum, Derry-Londonderry | | c.1940 | Enlarged black and white photograph of a dance held ... | |
| 6449 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs7435 | 1929-1940 | Correspondence on Paul Henry's separation from his f... | Paul Henry |
| 11197 | Trinity College Dublin, Manuscripts and Archives Department | V115 | 1934-1940 | Wages Book, weekly analysis, 1934-1940. | Courtown Papers |
| 11198 | Trinity College Dublin, Manuscripts and Archives Department | V116 | 1940-1945 | Wages Book, weekly analysis, 1940-1945. | Courtown Papers |
| 11199 | Trinity College Dublin, Manuscripts and Archives Department | V117 | 1940-1945 | Daily Wages Book 1940-1945. | Courtown Papers |
| 10235 | Trinity College Dublin, Manuscripts and Archives Department | TCDMss10582/4/1-3 | 1940-1947 | 2 letters to Jean Mongomery: Thank you from E Prenti... | |
| 10247 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs9265 | 1940 | Diary for 1940 which may belong to Athea Hannay, the... | |
| 10395 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs10066/291 | 1940-1954 | Letters and legal documents relating to the petition... | Denis Johnston Papers |
| 10584 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs8265/237 | 1940 | J. Butler to Miss Pearse referring to Mary Bridget&#... | Pearse Family |
| 11262 | Trinity College Dublin, Manuscripts and Archives Department | TCDMicrofilm/139 | 1940-1946 | Microfilm of Music Notebooks and Compositions for 19... | |
| 18615 | Trinity College Dublin, Manuscripts and Archives Department | TCD MS 10582 | 1922-1940 | /1, DU Co-operative Society Buffet suggestion/scrap ... | Papers relating to Jean Montgomery |
| 18761 | Trinity College Dublin, Manuscripts and Archives Department | TCD MS 11505 | 1888
1904
1922-1940 | Correspondence between Elizabeth Yeats and Cecil Har... | Cuala Press correspondence with C. Harmsworth |
| 1139 | UCC Special Collections & Archives | Box 2 | 1940-1980 | Contains material relating to Nancy McCarthy's c... | Nancy McCarthy Collection |
| 23413 | University of Limerick Special Collections and Archives | P2/ | 1940 | 76. Letter from Noinín Chathail Brugha, 9 June 1940... | The Daly Papers |
| 1039 | Waterford City Archives | LA1/19/A/1 | 1925-1940 | Records of the Library Committee, Minute Books: 7 O... | Records of the Library Committee |
| 1045 | Waterford City Archives | Fin 7/3/ | 1914-1940 | Rates South Ward 4:8: 1921 - 19229: 1922 - 192311: 1... | Records of the Finance Department |
| 1046 | Waterford City Archives | Fin 7/3/ | 1940-1958 | Rates South Ward 4:27: 1940 - 194128: 1941 - 194229:... | Records of the Finance Department |
| 1729 | Waterford City Archives | | 1934-1940 | Operations Book, 29 October 1934-10 June 1940. | Waterford City and County Infirmary |
| 1730 | Waterford City Archives | | 1940-1944 | Operations Book, 7 June 1940- 24 August 1944. | Waterford City and County Infirmary |
| 4533 | Waterford City Archives | | 1936-1940 | Minute Book of Waterford City and County Infirmary, ... | Waterford City and County Infirmary |
| 4534 | Waterford City Archives | | 1940-1944 | Minute Book of Waterford City and County Infirmary, ... | Waterford City and County Infirmary |
| 4549 | Waterford City Archives | | 1931-1940 | Payments and Receipts Book, 1 March 1931-1 March 194... | Waterford City and County Infirmary |
| 4594 | Waterford City Archives | | 1937-1940 | Cash Book, 1937-1940. | Waterford City and County Infirmary |
| 5913 | Waterford City Archives | AAC 08 | 1940-1995 | Catalogues: Catalogues for annual exhibitions, detai... | Arts Advisory Committee |
| 5916 | Waterford City Archives | AAC 11 | 1940s | Arts Advisory Committee Correspondence: Includes new... | Arts Advisory Committee |
| 23348 | Waterford City Archives | P27/ | 1940-1949 | Minute Books, Waterford County Council and City Bran... | Minute Books Waterford County Council and City Red Cross Society |
| 23364 | Waterford City Archives | C1/ | 1940 | 288: Grace Dieu Road Photographer: Anne Brophy View ... | Photographic Collections |
| 19226 | Westmeath County Archives Department | | 1927-1940 | Salary Registers:1927-1940 | Westmeath County Council |
| 19262 | Westmeath County Archives Department | | 1940-1961 | Westmeath County Council Petty Cash Book:8 February ... | Westmeath County Council |
| 19266 | Westmeath County Archives Department | | 1940-1989 | Registers of Managers' Orders:1940-1989 | Westmeath County Council |
| 19323 | Westmeath County Archives Department | | 1930-1940 | 168 Lady Emily Howard Bury deceased. Details of her... | Howard Bury Papers |
| 19342 | Westmeath County Archives Department | | 1940 | 288 Colonel C.K.H. Bury with Mrs Annie Kemp, agreeme... | Howard Bury Papers |
| 19399 | Westmeath County Archives Department | | 1923-1940 | Athlone Urban District Council Housing Minute Books:... | Athlone Local Authority Records |
| 19404 | Westmeath County Archives Department | | 1940-1944 | Athlone Urban District Council Service of Notices Le... | Athlone Local Authority Records |
| 19406 | Westmeath County Archives Department | | 1923-1940 | Athlone Urban District Council Housing Minute Books:... | Athlone Local Authority Records |
| 1475 | Wexford County Archive | | 1855-1940 | Financial Records of John E Redmond, Esq. June 1855-... | |
| 19937 | Wexford County Archive | | 1936-1940 | Wexford County Hospital Maternity Ward Reports:1 Jan... | Wexford County Hospital |