The Economist reports that:
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.
Today German-Americans are quietly successful. Their median household income, at $61,500, is 18% above the national norm. They are more likely to have college degrees than other Americans, and less likely to be unemployed. A whopping 97% of them speak only English at home.
They have assimilated and prospered without any political help specially tailored for their ethnic group. “The Greeks and the Irish have a far stronger support network and lobby groups than we do,” says Peter Wittig, Germany’s ambassador in America. There was no German-American congressional caucus until 2010, though there were caucuses for potatoes, bicycles and Albanian affairs. The German caucus has quickly grown to about 100 members, who lobby for trade and investment as well as the preservation of their common cultural heritage.