Have you got a wee bit o' irish in you? Celebrate your Irish heritage with these fun family history facts about Irish Americans from GenealogyBank.com. Find out how many Irish Americans are currently residing in the United States. Explore the history of Irish immigration to America. Discover the origins of popular Irish sayings and the most common Irish surnames. See what famous people have Irish American ancestry and learn what the top genealogy records are to trace your Irish roots.