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.
European Americans
The first large wave of European migration after the Revolutionary War came from Northern and Central-Western Europe between about 1820 and 1890. Most of these immigrants were from Ireland, Germany, Sweden, Denmark, and Britain, and with large numbers of Irish and German Catholics immigrating, Roman Catholicism became an important minority religion. Polish Americans usually used to come as German or Austrian citizens, since Poland lost its independence in the period between 1772 and 1795. Descendants of the first wave are dominant in the Midwest and West, although German descent is extremely common in Pennsylvania, and Irish descent is also common in urban centers in the Northeast. The Irish and Germans held onto their ethnic identity throughout the 19th and early half of the 20th centuries, as well as other European ethnic groups. Most people of Polish origin live in the Northeast and the Midwest (see also White ethnic).