Black '47: The Irish Famine Migration and Grosse Île

Few single years left as deep a mark on Canadian immigration history as 1847, a year Irish immigrants themselves came to call “Black '47.”

The Great Famine, caused by repeated failures of Ireland's potato crop beginning in 1845, forced hundreds of thousands of desperate families to flee the country in search of survival. A significant share of them sailed for Quebec, arriving at Grosse Île, a small quarantine island in the St. Lawrence River roughly 48 kilometres downstream from Quebec City that had been used as a quarantine station since a cholera outbreak in 1832.

Nothing about Grosse Île's existing facilities had prepared it for what arrived in 1847. Close to 100,000 Irish immigrants sailed for Quebec that year alone, more than three times the station's typical annual traffic, packed aboard overcrowded, poorly provisioned ships, many of which became known as "coffin ships". Passengers arrived weakened by malnutrition and, in many cases, already carrying typhus. The island's hospitals, built for a fraction of the demand, were overwhelmed within weeks. More than 5,000 people are believed to have died at sea before ever reaching the island, and official records show 5,424 burials on Grosse Île itself in that single year. Additional quarantine stations at Windmill Point near Montreal and Partridge Island near Saint John, New Brunswick, saw thousands more deaths, as cities struggled to absorb far more sick and destitute arrivals than their populations or resources could reasonably handle.

Not everyone who reached Grosse Île was so unfortunate. The majority of those who sailed in 1847 did survive the crossing and the quarantine, going on to settle across Ontario, Quebec, and the Maritimes, laying the foundation for Irish-Canadian communities that remain culturally distinct in places like Toronto, Ottawa, and Saint John to this day.

For genealogical research, Grosse Île's records are a genuine resource rather than simply a grim historical footnote. Library and Archives Canada maintains a searchable database of immigrants processed at the station between 1832 and 1937, drawn from passenger lists, hospital registers, and burial records. If your Irish ancestor's trail goes cold somewhere around the late 1840s, checking whether they passed through, or were lost at, Grosse Île is often the next logical step, however difficult that possibility might be to sit with.