German-Americans are America’s largest single ethnic group (if you divide Hispanics into Mexican-Americans, Cuban-Americans, etc). In 2013, according to the Census bureau, 46m Americans claimed German ancestry: more than the number who traced their roots to Ireland (33m) or England (25m). In whole swathes of the northern United States, German-Americans outnumber any other group (see map). Some 41% of the people in Wisconsin are of Teutonic stock.