Irish Emigration During the Great Famine (1845–1852)

Approximately 2.5 million people emigrated from Ireland during the Great Famine decade (1845–1855), with the peak years 1847–1851 seeing ~250,000 departures annually.

Destinations

• United States: ~1.5 million (70%) – New York, Boston, Philadelphia, Chicago.
• Great Britain: ~500,000 – Liverpool, Glasgow, London, Manchester.
• Canada (British North America): ~300,000 – Grosse Île quarantine station; many onward to US.
• Australia: ~70,000 (assisted + convict).
• Others: Argentina, New Zealand, South Africa, Caribbean.

Causes

• Potato blight (Phytophthora infestans) destroyed the staple crop of the landless poor (1845–1849).
• British policy failures: Laissez-faire economics, continued grain exports, inadequate relief (workhouses, soup kitchens), Gregory Clause (landlord eviction incentive).
• Pre-existing poverty: Subdivision of holdings, rack-rents, no industrial alternative.

Demographic Impact

• Ireland's population fell from ~8.2M (1841) to ~6.5M (1851) – **~20% loss** (death + emigration).
• Emigration continued for decades; population kept falling until 1960s.
• Diaspora now ~70–80 million worldwide claim Irish ancestry.

Legacy

The Famine shaped Irish identity, nationalist politics, Catholic Church power, and the demographics of the Anglosphere. It remains the defining trauma of modern Irish history.