NEW & UPDATED - "Tracing your Irish Ancestors: A Three-step Guide" 2026

Tracing your Irish Ancestors: A Three-step Guide by Brian Mitchell, Derry Genealogy.

Background
There are 2,508 parishes in Ireland. You can identify the civil parishes of Ireland, and their associated townlands, at https://www.johngrenham.com/places/civil_index.php by selecting county of interest on the map.
To gain insight into the economic and social landscape of 19th century Ireland you can consult 'A Topographical Dictionary of Ireland', published in 1837, by Samuel Lewis. Arranged in alphabetical order by parishes, towns and villages this book can be viewed online at http://www.libraryireland.com/topog/placeindex.php.
An excellent starting point for surname research is the ‘Surname Search’ option at https://www.johngrenham.com/surnames where you can explore the location, frequency, variant spellings and history of Irish surnames.

Research Steps
Step 1 - Search1901, 1911 and 1926 Census Returns
Although census enumerations were carried out every decade from 1821, the earliest surviving complete return for Ireland is that of 1901. The census enumerations of 1901 and 1911, arranged by townland in rural areas and by street in urban areas, can be searched, for free, at https://www.census.nationalarchives.ie.
These returns will list the names, ages and place of birth of all members in a household. The 1926 Census Returns can be searched at https://nationalarchives.ie/collections/search-the-1926-census.

Step 2 – Search for births, marriages and deaths
Civil registration of births, deaths and Roman Catholic marriages in Ireland began on 1st January 1864 while non-Catholic marriages were subject to registration from 1st April 1845. Prior to the commencement of civil registration of births, marriages and deaths in Ireland, family history researchers usually rely on baptismal, marriage and burial registers kept by churches. With civil registration of births and deaths commencing in 1864, and with the patchy survival of church records prior to1820, gravestone inscriptions can be a vital source for family historians.

Irish Civil Records of births, marriages and death scan now be searched and viewed at https://www.irishgenealogy.ie.
On searching index, which returns name, event type, year and name of Superintendent Registrar’s District, a pdf of the full register page in which that birth, marriage or death certificate appears can be downloaded by selecting ‘image’. At present, images are available for Births 1864-1925,Marriages 1845-1950 and Deaths 1871-1975. Further images of Deaths dating back to 1864 will follow later.

RootsIreland, at https://www.rootsireland.ie, is a good starting point for searching church registers of baptisms, marriages and burials as this website is the largest online source of Irish church register transcripts. You can either search across all counties or search a particular county.
For example, Derry Genealogy, at https://www.derry.rootsireland.ie, has transcribed and computerised the early baptismal and marriage registers of 97churches (38 Roman Catholic, 24 Church of Ireland and 35 Presbyterian; the earliest being the registers of St Columb’s Cathedral in Derry city which date from 1642) and gravestone inscriptions from 117 graveyards. This database also contains 387 surname histories, of Gaelic and Planter origin, listed at https://www.rootsireland.ie/derry-genealogy/list-of-derry-surname-histories, which are most closely associated, through numerical strength or uniqueness, with North West Ireland (in this instance counties Derry, Donegal, Fermanagh and Tyrone).

As the search facility on the RootsIreland website is very flexible it means that you should be able to determine if any entries of interest to your family history are held on this database. For example, if you are searching for the baptism/ birth of a child you can narrow the search down by year, range of years, names of parents and by parish of baptism/district of birth. Marriage searches can be filtered by year, range of years, name of spouse, names of parents and parish/district of marriage.

It must be stated, however, that a failure to find relevant birth/ marriage entries in this database doesn't mean that the events you are looking for didn't happen in Ireland. It simply means that they are not recorded in the database; for example, they may be recorded in a church whose registers don’t exist/ survive for the time period of interest or in a source that has not been computerised or, perhaps, in the database of another county.

For example, you can search, free of charge, at https://www.irishgenealogy.ie, Church of Ireland parish registers for counties Carlow and Kerry and Dublin city; and Roman Catholic parish registers of County Kerry, Dublin city and west and south Cork (i.e. parishes in Dioceses of Kerry and Cork and Ross except most of Cork city).

Step 3 – Search Census Substitutes
Quite often the only realistic strategy in tracing ancestors beyond church registers (which are the building blocks of family history) is to examine surviving land records and census substitutes, often compiled by civil parish, for any references to a surname or given name of interest.

The problem with these sources is that they name heads of household only; hence they provide insufficient information to confirm the nature of linkages between named people in these sources. Census substitutes, however, are very useful in confirming the presence of a family name in a particular townland and/or parish (i.e. in suggesting/confirming an ancestral home), and in providing some insight into the frequency and distribution of surnames.

• Mid-19th century Griffith’s  Valuation at https://www.askaboutireland.ie/griffith-valuation
• Early-19th century Tithe Books at https://titheapplotmentbooks.nationalarchives.ie/search/tab/home.jsp
• 1796 Flax Growers Lists at https://www.failteromhat.com/flax1796.htm

It must be emphasised such sources will confirm the presence of a name and/or surname of interest but they will not confirm if there is a connection between people with the same surname!