|Regions with significant populations|
| United States:
|Irish, English, Ulster Scots, Shelta|
|Roman Catholic (majority), Protestantism, and other Christian faiths.|
|Related ethnic groups|
|Bretons, Cornish, English, Manx, Scottish, Ulster-Scots, Welsh, Basque, Galicians|
The Irish are an ethnic group who come from or came from the island of Ireland. There are two countries on the island of Ireland: the Republic of Ireland and Northern Ireland. Many countries, especially English-speaking countries, have people with Irish roots.
In Northern Ireland, there have been violent fights between the Unionists, who identify as British and are mainly Protestant, and the Nationalists, who identify as Irish and are mainly Catholic. Irish people have a strong culture and beliefs.
Due to problems in Ireland, most importantly a famine between 1845 and 1852, caused by the potatoes in Ireland being destroyed by disease, many Irish moved out of Ireland and to other countries, including the United States, Canada, the United Kingdom and Australia. At present, many more Irish live in the United States than in Ireland, with many of them living in large American cities such as Boston, New York, and Chicago.