Many British Americans have ancestry in America that dates back to colonial times in the 17th and 18th centuries. Those who went to New England are known as Yankees. With their roots being in America for such a long period, many British Americans have begun to think of themselves ancestrally simply as "Americans." This is especially true in the South.

British emigrant and ethnic descent communities are found across the world, and in some places, settled in significant numbers. Countries with significant numbers of people of English, Scottish, Ulster (Scots-Irish) and Welsh ancestry or ethnic origin include the United States (particularly Utah, New England, New York, California, Virginia, West Virginia, and the Southern States), Australia, Canada, South Africa and New Zealand.