Although corn (or maize, as it's known throughout much of the world) has the honor of being grown in nearly all 50 states, its production is primarily concentrated in the northern and Midwestern states—collectively known as the U.S. Corn Belt.
In the 2014/2015 crop marketing year, (Sept. 1- Aug. 31) the United States grew nearly 14.2 billion bushels (360 million metric tons) of corn and roughly 13 percent of production was exported to more than 100 different countries.
Japan (26 percent), Mexico (23 percent) and Colombia (9 percent) made up the top three of U.S. corn destinations.
U.S. Produces Consistent U.S. Corn Crops Despite El Nino, La Nina Factors: http://bit.ly/20Aw9wv