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| Source | Date | Location |
| Book of Survey and Distribution | 1641 | NL Ms 972 |
| High Sherriffs of King's co. | 1655-1915 | J. Kildare Arch. Hist Soc 8(1) (1915)30-50 |
| Penders Census of Ireland | 1659 | SLC 924648, NL Ir 31041 c 4 |
| Marriage Indexes Meath, Killaloe, and Clonfert | 1691-1845 | SLC 100869 |
| Marriage Indexes Kilare | 1740-1850 | SLC 100868 |
| Tullamore Tenants of the Earl of Charleville | 1763 | SLC Book 941.5A1 |
| Relgious Census of Ballycommon | 1766 | SLC 100173, 258517 |
| Register of Tenants who Planted Trees: Geashill Parish | 1793-1907 | J. Kildare Arch. Hist. Soc. 15(3)(1973-74)310-18 |
| Protestants in Parishes of Ballyboggan, Ballyboy, Castlejordan and Ballybeg, Clonmacnoise, Drumcullen, Eglish, Gallen, Killoughey, Lynally, Renagh, Tullamore-Kilbride | 1802 | Ir. Anmc. 5 (2) (1973) 113-120 |
| Government Census of Parishes of Aghancon, Birr, Ettagh, Kilcolman, Kinnitty, Letterluna, Roscomroe, Roscrea, Seirkieran | 1821 | SLC 100818 |
| Tithe Applotment Survey | 1823-38 | SLC |
| Tithe BooksHouseholder's Index | 1823-38 | FHLC 919006 |
| List of Catholic Householders in Each Townland of Lusmagh Parish on Nov 1, 1824 | 1824 | SLC |
| J. Pigots City of Dublin and Hibernian Privincial Directory | 1824 | NL Ir 9141 p 75. |
| List of Contributors to a New Cathjolic Church at Wherry | 1830 | Included in Lusmagh Catholic Records |
| Census of Tubber Parish arranged by townland, giving age, occupation, and religion of each person | 1835 | NLI P 1994 |
| Rental of Offaly Estate, Parish of Clonsast, Townlands of Brackna, Clonsast, Clonbrock, Ballinoulart, Cappa, Ballyshane, Ballinrahan | 1840-50 | NL ms. 4337 |
| Census of Parishes of Eglish and Drumcullen, arranged by townaldn | 1840 | NL |
| Voters List | 1842 | NAI 1842-27 |
| Slater's National Commercial Directory of Ireland | 1846 | . |
| Emigrants from Kilconcouse, parish of Kinnitty | 1852 | Migrants from ireland 1847-52 Baltimore, GPO 1977 pp 57-59 |
| Griffith's Valuation | 1854 | SLC |
| Rental of Ballyfarrell and Derrymore | 1855 | NAI M 601 |
| Slater's Royal National Commercial Directory of Ireland | 1856 | |
| Slater's Directory of Ireland | 1870 | |
| Slater's Royal National Commercial Directory of Ireland | 1881 | |
| John Wright, The King's Co. Directory. | 1890 | (Reprinted as Offaly 100 Years Ago, Tullamore, 1989) |
| King's County Directory | 1890 | MLI |
| Slater's Royal National Directory | 1894 | . |
| Census | 1901 | 843007-20 |
| Census | 1911 | NAI |
| "The Fitzgeralds, Barons of Offaly" | R.S.A.I. 44(19143) 99-113 | |
| Some Notes on the Fox Family of Kilcoursey by Stone | Co. Chicago, 1890 | |
| The Hopper Family | Ir. Anc 149(2)(1982)13-19, 59-73 | |
| The Moone Family of Doon | Irish Family Histo. Soc. J. 2 (1986)71-81 | |
| Odlums of Offaly | Irish Family History 5 (1989) 71-79 | |
| Pierce Family of Offaly | Irish Family History 8 (1992) 78-83 | |
| Smith (see also Co. Tipperary) | ||
| Narrative Pedigree of the Family of Smith of Co. Offaly | GO Ms. 556 | |
| The Turpin Family of Tullamore, Co. Offaly | Ir. Anc. 16(1)(1984)1-5 | |
| The Usehrs of Birr | Ir. Gen 5(5)(1978)606-24 | |
| Memoir of the Warburton Family of Garryhinch, Kings Co., | Dublin, 1848, 2nd ed. 1881 | |
| Sources for Offaly History | Byrne, Michael Offaly Research Library, 1978 | |
| Tullamore Catholic Parish: A historical Survey | Tullamore Parish Committee, 1987 | |
| The Landscape of Slieve Bloom - A Study of it's Natural and Human Heritage | Dublin, 1979 by Feehan, J. | |
| The Midland Sept and the Pale, An account of the early septs and later settlers of the King's County and life in the English Pale. | Hitchcock, F.R.M. Dublin, Sealy, 1908 | |