Iowa is the largest producer of corn in the United States. While officially nicknamed "The Hawkeye State," Iowa is also known as "The Corn State" due to 90% of its land being devoted to agriculture. Iowa produced 2,296,200,000 bushels of corn in 2020, about 16.19% of the total U.S. production. Illinois follows Iowa with 2,131,200,000 bushels of corn, about 15.03% of the total U.S. production. Nebraska and Minnesota produced 1,790,090,000 and 1,441,920,000 respectively. Together, the four top corn-producing states produced over 54% of the country's total corn.

Source: World Population Review