US Crops by Acreage

Why the Same Crops Dominate Year After Year

The U.S. crop ranking is remarkably stable from year to year because the underlying drivers, including climate, soil type, irrigation infrastructure, transportation networks, processing capacity, and historical farm specialization, change slowly. Corn dominates because the upper Midwest combines deep prairie soils, reliable summer rainfall, an enormous existing infrastructure of grain elevators and rail lines, and decades of farmer expertise. Soybeans benefit from the same Corn Belt geography and rotate naturally with corn for soil-nitrogen reasons. Hay is the third-largest crop because every state with cattle, dairy, or horses needs forage, which spreads its acreage broadly across the country. Wheat is concentrated in the Plains because the climate favors winter wheat in Kansas, Oklahoma, and Texas and spring wheat in North Dakota and Montana. The lower-ranked crops, including cotton, rice, sunflower, sorghum, barley, and oats, are each highly regional and reflect specific climatic or historical specializations.

When the rankings do shift, the cause is usually a structural change rather than a one-off event. The decade-long expansion of soybean acreage tracked the rise of Asian protein demand and the build-out of soybean crushing capacity in the Midwest. The contraction of oat acreage tracked the disappearance of horses from American agriculture. The expansion of corn for ethanol after the 2007 Renewable Fuel Standard shifted millions of acres from soybeans and wheat into corn. The USDA Economic Research Service tracks these structural shifts in its long-run baseline projections and major crop outlook reports.

A Quick Tour of the Major Commodity Crops

Corn is the largest U.S. crop by acreage and production. It is grown primarily as field corn for animal feed, ethanol, and food processing, with sweet corn for direct human consumption representing only a small share of the total. The Corn Belt, including Iowa, Illinois, Nebraska, Indiana, Minnesota, and Ohio, produces most of the national crop, with significant additional acreage in South Dakota, Kansas, Missouri, and Wisconsin. Soybeans are the second-largest crop and rotate with corn across most of the same Midwestern geography. Soybean meal is the dominant U.S. protein source for poultry and livestock feed, and soybean oil is the leading U.S. vegetable oil. Hay is the third-largest crop by total acreage because forage is needed wherever cattle, dairy cows, and horses are raised, which spreads its production broadly across the country.

Wheat is the fourth-largest U.S. crop, divided between hard red winter wheat in the southern Plains, hard red spring wheat in the northern Plains, and soft red and white wheats grown in the eastern and western United States respectively. Cotton is concentrated in the Southern states, with Texas accounting for the largest share, and supports a domestic textile industry plus a large export market to Asia. Rice is grown in the Mississippi Delta states and the Sacramento Valley of California, with Arkansas leading the country. Sunflower production is concentrated in North Dakota and South Dakota, sorghum in Kansas and Texas, barley in Idaho and Montana, and oats are spread broadly across the northern United States but at modest acreage compared to the major commodity crops.

How to Use the Crop Index

For farmers, the most useful view is the leading-state column: it shows where the deepest pools of expertise, infrastructure, and crop insurance precedent exist for any given commodity. For commodity traders and procurement professionals, the production volume column gives the clearest read on national supply. For researchers and policy analysts, the state count column captures geographic diversification. High state counts indicate widely planted, climatically flexible crops, while low state counts indicate regionally specialized crops with concentrated supply risk. Each individual crop page expands on these dimensions with the full state-by-state breakdown.

Related Pages on This Site

For the geographic side of the data, the states index ranks every U.S. state by total cropland and shows the leading crops grown in each. The trends page surfaces the largest movers and most concentrated commodities in the current dataset. The methodology page documents how acreage, production, and state counts are pulled from USDA NASS, including the field definitions and edge cases.