Possibly the swiftest route to your roots.

United States Of America, The

Emigration to the United States of America plays a significant part in Ireland's history. Irish Americans are citizens of the United States who can trace their ancestry to Ireland. A total of 36,278,332 Americans - estimated at 11.9% of the total population - reported Irish ancestry in the 2008 American Community Survey conducted by the U.S. Census Bureau. All related links feature here: a superb source for Irish history.