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. Roughly another 3.5 million (or about another 1.2% of Americans) identified more specifically with Scotch-Irish ancestry. The Irish diaspora population in the United States is roughly 6 times the modern population of Ireland.

The only self-reported ancestral group larger than Irish Americans is German Americans. The Irish are widely dispersed in terms of geography, and demographics. Irish American political leaders have played a major role in local and national politics since before the American Revolutionary War: eight Irish Americans signed the United States Declaration of Independence, and 22 American Presidents, from Andrew Jackson to Barack Obama, have been at least partly of Irish ancestry. (See "American Presidents with Irish ancestry" below.)

Russell Dominic Peters (born September 29, 1970) is a Canadian comedian, actor and disc jockey. He began performing in Toronto in 1989 and has been nominated for four Gemini Awards.

Russell Peters was born in Brampton, Ontario, Canada to Eric and Maureen Peters. His family is of Anglo-Indian ancestry and is Catholic. His father was born in Bombay, Maharashtra, India, and worked as a federal meat inspector; he is regularly mentioned and featured in his comedy work. His mother was born in Calcutta, West Bengal, India. He has an older brother named Clayton who was born in Calcutta. Russell attended Chinguacousy Secondary School for grades 9–10, and North Peel Secondary School for grades 11–12 in Brampton.

Peters began performing in Toronto in 1989. Peters' popularity extends to several countries. He has since also performed in the United Kingdom, United States, Australia, New Zealand, Ireland, Afghanistan, Sweden, South Africa, India, the Caribbean, Philippines, Vietnam, mainland China, Canada, Hong Kong, Sri Lanka, France, Singapore, United Arab Emirates, Bahrain, Jordan, Norway, Lebanon, Oman, Pakistan, Malaysia, and Trinidad among other places.

English Americans (occasionally known as Anglo-Americans, although this may have a wider linguistic meaning) are citizens of the United States whose ancestry originates wholly or partly in England.

According to American Community Survey in 2010 data, Americans reporting English ancestry made up an estimated 9.0% of the total U.S. population, and form the third largest European ancestry group after German Americans and Irish Americans. However, demographers regard this as an undercount, as the index of inconsistency is high, and many, if not most, people from English stock have a tendency to identify simply as Americans or, if of mixed European ancestry, nominate a more recent and differentiated ethnic group. Throughout the nineteenth century, England was the largest investor in American land development, railroads, mining, cattle ranching, and heavy industry. Perhaps because English settlers gained easy acceptance, they founded few organizations dedicated to preserving the traditions of their homeland.