List of Irish Americans
This is a list of notable Irish Americans, including both original immigrants who obtained American citizenship and their American-born descendants. For more information see also: List of Americans of Irish descent. List. "To be included in this list, the person must have a Wikipedia article showing they are Irish American or must have references showing they are Irish American and are notable." Presidents. At least 22 presidents of the United States have some Irish ancestral origins, although the extent of this varies. For instance President Clinton claims Irish ancestry despite there being no documentation of  any of his ancestors coming from Ireland, but Kennedy on the other hand have strong documented Irish origins. Also Ronald Reagan's great grandfather was an Irish Roman Catholic, and his mother had some Scots-Irish ancestry. James K. Polk also had Scots-Irish Ancestry. Kennedy and Joe Biden were raised as a practicing Catholics.