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
The early Ulster immigrants and their descendants at first usually referred to themselves simply as "Irish," without the qualifier "Scotch." It was not until more than a century later, following the surge in Irish immigration after the Great Irish Famine of the 1840s, that some descendants of the Protestant Irish began to refer to themselves as "Scots-Irish" to distinguish them from the predominantly Catholic, and largely destitute, wave of immigrants from Ireland in that era. However, most descendants of the Scots-Irish continued to consider themselves "Irish" or "American" rather than Scots-Irish. The two groups had little initial interaction in America, as the 18th-century Ulster immigrants were predominantly Protestant and had become settled largely in upland regions of the American interior, while the huge wave of 19th-century Catholic immigrant families settled primarily in the Northeast and Midwest port cities such as Boston, Philadelphia, New York, Buffalo, or Chicago. However, beginning in the early 19th century, many Irish migrated individually to the interior for work on large-scale infrastructure projects such as canals and, later in the century, railroads.