St. Patrick's Day
About 33 million Americans—10.5% of the total population—reported Irish ancestry in the 2013 American Community Survey conducted by the U.S. Census Bureau. This compares with a population of 6.4 million on the island of Ireland.
Three million people separately identified as Scots-Irish, whose ancestors were Ulster Scots who emigrated from Ireland to the United States but are considered Irish Americans in most historical surveys.
A combination of the colors of the Irish and American flags, this tartan represents the huge number of Americans claiming Irish ancestry.
For a genealogical perspective of Irish emigrations from the 1840s on, click the collage.
Happy St. Patrick's Day