European Americans (also referred to as Euro-Americans) are Americans of European ancestry. This term includes people who are descended from the first European settlers in the United States as well as people who are descended from more recent European arrivals. European Americans have been the largest panethnic group in the United States since about the 17th century.

The Spaniards are thought to be the first Europeans to establish a continuous presence in what is now the contiguous United States, with Martín de Argüelles (b. 1566) in St. Augustine, then a part of Spanish Florida, and the Russians were the first Europeans to settle in Alaska, establishing Russian America. The first English child born in the Americas was Virginia Dare, born August 18, 1587. She was born in Roanoke Colony, located in present-day North Carolina, which was the first attempt, made by Queen Elizabeth I, to establish a permanent English settlement in North America.

In the 2016 American Community Survey, German Americans (13%), Irish Americans (12%), English Americans (9%), Italian Americans (6%), and Polish Americans (3%) were the five largest self-reported European ancestry groups in the United States, forming over a third of the total population. However, the number of people with British ancestry is considered to be significantly under-counted, as many people in that demographic tend to identify themselves simply as Americans (20,151,829 or 7.2%). The same applies to Americans of Spanish ancestry, as many people in that demographic tend to identify themselves as Hispanic and Latino Americans (58,846,134 or 16.6%), even though they carry a mean of 65.1% European genetic ancestry, mainly from Spain. In the 2000 census over 56 million or 19.9% of the United States population ignored the ancestry question and are classified as "unspecified" and "not reported".