49,206,934 Germans
By far the largest ancestral group, stretching from coast to coast across 21st century America is German, with 49,206,934 people. The peak immigration for Germans was in the mid-19th century as thousands were driven from their homes by unemployment and unrest.
The majority of German-Americans can now be found in the the center of the nation, with the majority living in Maricopa County, Arizona and according to Business Insider, famous German-Americans include, Ben Affleck, Tom Cruise, Walt Disney, Henry J. Heinz and Oscar Mayer.
Indeed, despite having no successful New World colonies, the first significant groups of German immigrants arrived in the United States in the 1670s and settled in New York and Pennsylvania.
Germans were attracted to America for familiar reasons, open tracts of land and religious freedom and their contributions to the nation included establishing the first kindergartens, Christmas trees and hot dogs and hamburgers.
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