County Offaly, Ireland Genealogy

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Gotoarrow.png Ireland Gotoarrow.png County Offaly
County Offaly.jpg
County Offaly, in Ireland was formerly known as King’s County. It is located in the Irish Midlands in the province of Leinster and consists of 771 square miles with its greatest length being 52 miles from the River Ollatrim near Moneygall to the boundary near Edenderry.

Anciently, it was part of the Kingdom of Ui Failghe from which it gets its present name. The British began occupation in the thirteen century, but did not gain control until the sixteen century when it was named King’s County in 1547 in honour of King Philip II of Spain. Its name was changed to Offaly in 1920 and it became part of the Republic of Ireland on its formation in 1921.

In 1821, the population was 131,088. It increased to 146,857 in 1841, but then began to decrease to 52,592 in 1926. In 2006, the population was 70,868. In 1871, 88.8% of the population were Roman Catholic with 9.9% of the Church of Ireland, 0.4% Presbyterians and 0.5% Methodists. In 1926, 92.6% were Roman Catholic with 6.5% Church of Ireland.

General County Research Information

Further information about County Offaly is available at the GenUKI site.

Civil Jurisdictions and Parish Research Information

A map of the Civil Parishes of County Offaly is available at Irish Times site.

A map of the Catholic Parishes of County Offaly is available at the Irish Times site. 

Civil Parish - Church of Ireland

Barony Poor Law Union Catholic Parish[1] Catholic Diocese[1]
Aghancon Ballybritt Roscrea Seirkieran Ossory
Ardnurcher or Horseleap Kilcoursey Tullamore Clara Meath
Ballyboy Ballyboy Parsonstown Ballyboy and Killoughy Meath
Ballyburly Lower Philipstown Edenderry Rhode
Ballyburly Warrenstown Edenderry
Ballycommon Lower Philipstown Tullamore part Daingean; part Tullamore Kildare
Ballykean Geashill Tullamore Killeigh Kildare
Ballykean Upper Philipstown Mountmellick
Ballykean Upper Philipstown Tullamore
Ballymacwilliam Warrenstown Edenderry Edenberry; part Rhode Kildare
Ballynakill Coolestown Edenderry Edenberry; Daingean Kildare
Birr Ballybritt Parsonstown
Borrisnafarney Clonlisk Roscrea
Castlejordan Coolestown Edenderry

Castlejordan Warrenstown Edenderry
Castletownely Clonlisk Roscrea
Clonmacnoise Garrycastle Parsonstown
Clonsast Coolestown Edenderry
Clonyhurk Upper Philipstown Mountmellick
Corbally Ballybritt Roscrea

Corbally Clonlisk Roscrea
Croghan Lower Philipstown Edenderry
Cullenwaine Clonlisk Roscrea
Drumcullen Eglish Parsonstown
Dunkerrin Clonlisk Roscrea
Durrow Ballycowan Tullamore
Eglish Eglish Parsonstown
Ettagh Ballybritt Roscrea

Ettagh Clonlisk Roscrea
Finglas Clonlisk Roscrea
Gallen Garrycastle Parsonstown
Geashill Geashill Tullamore
Geashill Upper Philipstown Edenderry
Geashill Upper Philipstown Mountmellick
Geashill Upper Philipstown Tullamore
Kilbride Ballycowan Tullamore

Kilbride Kilcoursey Tullamore
Kilclonfert Lower Philipstown Tullamore
Kilcolman Ballybritt Parsonstown

Kilcolman Clonlisk Parsonstown
Kilcolmin Clonlisk Roscrea
Kilcumreragh Kilcoursey Tullamore
Killaderry Lower Philipstown Tullamore
Killoughy Ballyboy Tullamore
Kilmanaghan Kilcoursey Tullamore
Kilmurryely Clonlisk Roscrea
Kinnitty Ballybritt Parsonstown
Lemanaghan Garrycastle Parsonstown

Lemanaghan Garrycastle Tullamore
Letterluna Ballybritt Parsonstown
Lusmagh Garrycastle Parsonstown
Lynally Ballycowan Tullamore
Monasteroris Coolestown Edenderry
Rahan Ballycowan Tullamore
Reynagh Garrycastle Parsonstown
Roscomroe Ballybritt Parsonstown

Roscomroe Ballybritt Roscrea
Roscrea Ballybritt Roscrea

Roscrea Clonlisk Roscrea
Seirkieran Ballybritt Parsonstown

Seirkieran Ballybritt Roscrea
Shinrone Clonlisk Roscrea
Templeharry Clonlisk Roscrea
Tisaran Garrycastle Parsonstown
Wheery or Killagally Garrycastle Parsonstown


  • 1885 County Map: Courtesy of London Ancestor | Note that during this time period it was known as King's County


Game Licences for Co. Offaly and Co. Galway in 1821.  List of Game Licences for each applicant of Co. Offaly and Co. Galway published in the Limerick Crhronicle.  Each entry gives name, and their residential address. Article in The Irish Ancestor, vol. XVII no. 1. 1985 pages 23-25. Family History Library Ref. 941.5 B2i


Abstracts of Wills.  Article  has a collection of Will Abstracts, gathered from many sources including Owine Dempsie, of Cloinguaine, King's County 24 Feb. 1637.  Article found in The Irish Ancestor, vol.II, no. 2 1970 page 117-127, Family History Ref. 941.5 B2i

Goodbody, Olive C. Quaker Inventories. Deaths and inventories of some Quakers in Co. Kildare, Dublin and Offaly including Robert Fayle, a farmer at Killone (Killowen) in the parish of Castlejordan in the northern part of Offaly, whose Will was proved in Prerogative Court in 1758. Article in The Irish Ancestor, vol.III. no.1.1971 pages 52-62, Family History Ref. 941.5 B2i

Abstract of Wills.  Article lists heirs of John Baldwin of Coroghlanty, Kings Co. dies 1699. Article in The Irish Ancestor, vo.V. no.1.1973 pages 53-61. Family History Library Ref. 941.5 B2i v5-6.

  Web Sites

To view a list of Offaly web sites, visit for some great sites.

  1. 1.0 1.1 Ryan, James G. Irish Records: sources for family and local history. USA:, 1997. FHL 941.5 D23r