irish american ethnicity
2. Second to German, more Americans claim Irish heritage than any other ethnicity. Despite this distinction, many Americans donât realize that the United States celebrates Irish-American Heritage Month in March or the unique characteristics of the Irish-American demographic.he average Irish American is also about two years older than Americans generally. Although the first large wave of Irish immigrants arrived in the United States in the 19th century, the Irish continue to relocate to the U.S. Tens of thousands of Irish immigrants become naturalized U.S. citizens each year.