Which of the following states primarily produces corn?

Illinois is the state primarily known for producing corn due to its rich soil and favorable climate conditions, which create optimal growing circumstances for this crop. The state's agricultural infrastructure and tradition of corn cultivation support high yield and efficiency, making it one of the leading corn-producing states in the United States.

Illinois benefits from the Central Corn Belt’s favorable weather patterns, which include warm summers and adequate rainfall, essential for corn's growth cycles. The state’s large expanses of flat land lend themselves well to large-scale farming operations, further enhancing its ability to produce significant quantities of corn. This places Illinois at the forefront of national corn production, often ranking in the top tiers compared to other states with more limited agricultural focus on corn.