Almost 1 in 10 Americans claim Irish heritage, according to the Census Bureau. But even the non-Irish celebrate Saint Patrick ...

They say everyone is Irish on St. Patrick’s Day — but what about the other 364 days of the year? In honor of the annual March 17 celebration, the U.S. Census Bureau painted its map green, showing ...

A secret map of Ireland's coastline played a crucial role in taking down a powerful alliance of pirates that had based itself in the southwest of Ireland in the 17th century.

In Part 2, as we explore Montana's ties to Ireland, NBC Montana's Laurel Staples and her husband, Chris Line, travel to ...

And that’s despite only about 9.4% of Americans claiming Irish ancestry. The March 17 holiday – which, strictly speaking, marks the death of the fifth-century Roman Catholic saint credited ...

More than 1.9 million Pennsylvanians, or about 14.8%, report having Irish ancestry. That’s second to the 21.7% who report German ancestry, according to Census Bureau data. (Also coming in with higher ...