County Down

Contae an Dúin

"Where the Mountains of Mourne sweep gently down to the sea."

Estimated Emigrants 145,000+

Peak Migration Eras 1846–1890

Primary US Destinations Pennsylvania, New York, Ohio

County Down Historical Heritage & Diaspora

County Down lies south of Belfast, famous for the majestic Mourne Mountains that inspired Percy French’s beloved song The Mountains of Mourne. At Down Cathedral in Downpatrick, a memorial stone marks the traditional burial site of St. Patrick, alongside St. Brigid and St. Colmcille.

Down produced significant early Scots-Irish emigrants to the American colonies as well as nineteenth-century migrants to New York and Philadelphia.

Leading Down surnames include McGuinness, Rice, Rogan, Hanna, Johnston, and Maginnis.

Historical Migration Journey

County Down Emigration Timeline (1845 – 1920)

1845 – 1852 · The Great Hunger (An Gorta Mór)

Catastrophic Potato Blight & Transatlantic Coffin Ships

Successive failures of the potato crop decimated tenant farming communities. Facing ruthless landlord clearances and starvation, over one million people fled across the Atlantic. Families boarded cramped wooden sailing barques from ports like Cobh, Derry, and Galway, arriving at Boston Harbor and Castle Garden, New York.

1880 – 1900 · The Industrial & Mining Surge

Chain Migration, Coal Valleys, and Urban Labor Solidarity

Younger siblings and children emigrated through prepaid tickets and diaspora remittances sent home from America. Immigrants fueled the industrial expansion of the United States—mining anthracite in Pennsylvania, digging copper in Butte, Montana, and operating textile mills across New England while establishing the first labor unions.

1920s · Independence, Irish Free State & Civic Leadership

War of Independence Remittances and Second-Generation Rise

American diaspora communities raised millions of dollars (via Éamon de Valera's 1919 US tour) to support Irish independence. Second and third-generation Irish-Americans ascended into the heights of US jurisprudence, municipal leadership, journalism, and cultural institutions.