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The Irish Family Genealogist

This Week's Question: Why did my Ancestor leave Ireland?

The different waves of emigration from Ireland


Céad míle fáilte,

Each week we take a reader question and share suggested approaches, resources and a little historical context to help answer that question.

Do feel free to reply to this email and let me know if it helped you in any way, it's always great to get feedback.

Today we answer the question: Why did my Ancestor leave Ireland?

Let's kick off with the following question from Brian:


"My Irish ancestors seem to have come to America at very different times. The Byrnes arrived in Philadelphia in 1795, the Kellys came to Boston during the Famine, and the Murphys didn't leave Cork until 1902. Were there different waves of emigration from Ireland? What made people leave at different times, and did it matter which part of Ireland they came from?"

Brian, Boston, Mass., USA

Thank you, Brian, for your question. Understanding when and why your ancestors left Ireland can provide crucial context for your family history and help you focus on your research efforts. Irish emigration wasn't one steady stream but rather several distinct waves, each with its own causes and patterns.



Let me lay out the major periods of Irish emigration to the USA and what they might tell us about your family's story.

Note: Although this example is for the USA and their previous colonies - many of the time-periods and reasons are valid for emigration to other locations.


The Colonial Period (1700-1776).

The first significant wave of Irish emigration to America followed distinct patterns that we can trace through ship lists, church records, and settlement documents.

Many of the early Irish emigrants during this period were Ulster Presbyterian families who had been in Ulster for at least two generations by this time. Most would have identified as Irish. These emigrants were used to living "on the frontier" in Ulster, which made them particularly suited to the frontiers of the North American colonies:

  • Mainly from counties Antrim, Derry, Down, and Tyrone. Most departed from ports like Belfast, Derry, and Newry.
  • Often began with young, single men or individual families
  • Ministers sometimes led groups of their congregation
  • Most settled in Pennsylvania, Virginia, and the Carolinas
  • Many were textile workers, farmers, and skilled craftsmen
  • Some were indentured servants - they had to work off payment for their passage on arrival in North America


Why did they leave? Usually a combination of the following:

  • Rent increases following land lease renewals (known as "rent-racking").
  • Restrictions on Presbyterian worship and rights
  • Poor harvests, particularly 1717-1718
  • Competition from English textile imports
  • Favourable reports of opportunities in America

Of course, there were small numbers of emigrants from other religions and other parts of Ireland - but this number was dwarfed by the arrival of the Scotch Irish from Ulster during this time period.


The Early Republic Period (1780-1830).

This period shows changing patterns of emigration, though evidence for exact numbers and origins is often limited. What we do know:


Ulster Emigration Continued:

  • Protestant emigrants, particularly from Ulster, still dominated
  • Many had resources to pay for passage
  • Established networks helped newer arrivals
  • Often settled in expanding American frontier areas


Changes in the 1810s-1845:

  • Gradual increase in Catholic emigration as Penal Law restrictions eased
  • Poor Irish harvests in 1816-1818 affected many areas. The effect of these bad harvests was exacerbated by increasing subdivision of farmland and changes in land tenure systems in Ireland.
  • Domestic textile industry began declining in Ireland
  • New American industries started to attract skilled Irish workers
  • More regular shipping routes developed from Dublin and Cork
  • Seasonal migration to Britain became a stepping stone to longer journeys to the USA
  • Some Irish landlords offered assisted emigration to consolidate their land holdings

However, most Irish emigrants in this period still needed significant resources to travel which limited emigration to those who could afford passage or had assistance from others.


The Great Irish Famine (1845-1852).

The Famine period saw unprecedented levels of emigration that varied significantly by the region and social class in Ireland. Approximately 1.5 million people left Ireland during these years, while another million died from famine-related causes:

  • Western Irish counties saw highest emigration rates
  • Some local areas lost over 30% of their population
  • Ulster, with its more diverse economy, was less affected
  • Coastal areas often saw earlier and higher emigration rates
  • Urban areas became gathering points for those seeking passage


There was a changing Emigrant Profile during this period:

  • Early Famine emigrants often had some resources - later years saw more destitute families leaving
  • Landlords sometimes funded "assisted emigration" schemes
  • Previously resistant farming families began leaving
  • Higher proportion of whole family groups emigrated


On their Journey and Settlement:

  • Many emigrated from ports closest to their homes
  • Liverpool became a major transit point
  • Ships were often overcrowded with poor conditions
  • Mortality rates on "coffin ships" reached 20% or higher
  • More emigrants settled in North American urban areas than previous waves


Social Impact on those left behind in Ireland:

  • Extended family groups often separated
  • Communities redistributed land among remaining residents
  • Letters were received from emigrants who both encouraged and warned those back in Ireland
  • Altered traditional inheritance and marriage patterns

Port records, ship lists, and contemporary accounts show how emigration patterns changed over these years. Early emigrants often followed established routes to relatives, while later waves created new settlement patterns, particularly in urban areas in the USA.


Post-Famine Emigration (1853-1900).

This period saw more organised emigration:

  • Better ships and established routes
  • More women emigrating independently (without spouses)
  • Strong influence of chain migration - this effect often led to populations continuing to decline in some Irish counties all the way up to 1971
  • Many had specific jobs promised/arranged before leaving
  • Continued response to land problems in Ireland
  • Growing attraction of urban opportunities in the USA


Early to mid 20th Century (1900-1960).

This final major wave that we will mention had some distinct characteristics:

  • More urban and educated emigrants
  • Better organised transportation
  • Many went to specific jobs or family members
  • Growing number from small towns
  • More likely to have some savings
  • Often maintained closer ties with home

My own parents' families left during this period. On my father's side, all four siblings emigrated to the UK and all four returned to Ireland inside 20 years.

On my mother's side, 9 out of 10 siblings emigrated to Canada, the USA and the UK. Four of them returned to Ireland inside 20 years.


What Does This Mean for Your Research?

Looking at Brian's family pattern:

  • The Byrnes (1795): Likely part of the skilled craftsmen/farming wave

  • The Kellys (Famine): Part of the largest emigration wave

  • The Murphys (1902): Representative of the more organised, urban emigration


Key Questions for Your own Research:

  1. What was happening in their location of Ireland when they left? What were the factors that "pushed" your ancestors out of Ireland? What were the opportunities that "pulled" them?

  2. Did they follow established migration patterns?

  3. Did other family members follow later?

  4. What skills or resources did they bring?


In Conclusion.

Understanding emigration waves and patterns can transform your research strategy. When you know which wave your ancestors were part of, you can focus your search in the areas in Ireland most affected during that period. You'll have a better idea of which ports they likely departed from and what route they might have taken.

Perhaps, most importantly, you can look for other families who followed similar paths – these families often maintained connections in both Ireland and America that can provide crucial clues. You'll also know which types of records were created during each period, helping you make the most of available sources.

Slán for now,

Mike.

PS. I'd love to answer every one of your Irish genealogy questions, but there just aren't enough hours in the day! So, if you would like more detailed help - do visit the Green Room.

When you're ready, here are 2 ways we can help:



  1. Take our free Irish Genealogy Course

  2. Join the Green Room: Join 6,500 other friendly and helpful Irish Family History Researchers in the Green Room today.


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Mike Collins
mike@aletterfromireland.com
Your Irish Heritage, Old Abbey, Waterfall, County Cork, Ireland

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