The USDA reports that farmers intend to plant 97.3 million acres of corn this year, the most since 1936.
The spring planting survey released Thursday says the 2013 corn planting forecast is up slightly from last year's 97.2 million acres.
Corn remains profitable, as prices are strong after last year's drought left the grain in short supply.
Record corn acreage is expected in Arizona, Idaho, Minnesota, Nevada, North Dakota, and Oregon.
But some Corn Belt states will continue to be affected by the worst drought since the 1950s, with slightly less planted acreage expected.
The report says farmers plan to plant 77.1 million acres in soybeans, down slightly from 2012's 77.2 million acres but still the fourth-highest soybean planting on record.