From the Library of Congress, Immigration and Relocation in U.S. History, German:
“The German immigrant story is a long one—a story of early beginnings, continual growth and steadily spreading influence. Germans were among the first Europeans to make their homes in the New World, and are among the United States' most recent arrivals. They were aboard the first boats that came ashore at Jamestown, and they built the rockets that took men to the moon. In the years in between, they moved into nearly every corner of the U.S., tried their hand at nearly every trade and pursuit, and helped shape the fundamental institutions of American life.
“Though they endured their share of hardship, they escaped much of the tragedy and harsh treatment that plagued many immigrant groups. Today, more than 40 million Americans claim German ancestry.”
Source: U.S. Census Bureau, International Database (demographic data) and USA Trade Online (trade data); Central Intelligence Agency, The World Factbook (country reference maps).
Note: Click on the image above for the full webpage on Germany, the 18th most populous country in the world.
Source: 2021 American Community Survey (ACS) 1-Year Estimates.
Note: The Table C04006 image above was downloaded from Census.gov into Excel and modified to sort the Estimate column numbers from 331,893,745 down to 3,967,734. German is the most reported ancestry in the U.S.
From Foreign Trade > U.S. International Trade Data:
Note: After you create an account, select options for “State Export Data (Origin of Movement)” or “State Import Data (State of Destination)” by “Harmonized System (HS)” or “NAICS.” Select “State,” “Measures,” “Commodity,” “Country” (select "Germany”) or “Time” for data. More information can be found in the Quick Start Guide. USA Trade Online does not provide direct links to the data.