Irish Canadians
The first waves of Irish immigrants took place between 1763 and 1880. when ten thousand Irish immigrants arrived on the Island. From 1800 to 1850, "10,000 immigrants from every county in Ireland" had settled in Prince Edward Island and represented 25% of the Island population by 1850.
Irish Americans
Philadelphia, Boston, New York, and Chicago have historically had neighborhoods with higher percentages of Irish American residents. Regionally, the most Irish American states are Massachusetts, New Hampshire, Maine, Vermont, Rhode Island, Delaware, Pennsylvania, and Connecticut, according to the U.S. Census Bureau American Community Survey in 2013. In consequence of its unique history as a mining center, Butte, Montana, is also one of the country's most thoroughly Irish American cities. Smaller towns, such as Greeley, Nebraska (population 466), with an estimated 51.7% of the residents identifying as Irish American as of 2009–13 were part of the Irish Catholic Colonization effort of Bishop O'Connor of New York in the 1880s.