What State Produces the Most Corn?

What state produces the most corn? In 2020 Iowa produced 2.3 billion bushels of corn, making it the #1 producer of corn in the United States.  Illinois produced 2.1 million bushels making it the 2nd most productive corn state.

2020 State Corn Production Rankings: What State Produces the Most Corn

2020 State Corn Production Rankings

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A table of the 11 most productive state corn producers is shown below.

Corn Production Rankings: 2020
Rank State Production (M bu)
1 Iowa 2296.2
2 Illinois 2131.2
3 Nebraska 1790.1
4 Minnesota 1441.9
5 Indiana 981.8
6 Kansas 766.5
7 South Dakota 729.0
8 Ohio 564.3
9 Missouri 560.9
10 Wisconsin 516.8
11 Michigan 306.5

Table of Contents

A 2020 Corn Production Forecast 
A History of Corn Production by State
How many acres of corn are grown in Iowa?
What is Iowa’s average corn yield?
How can I know state corn production before the season is over?

The 2020 Production in Review

The 2020 US grain growing season experienced two significant weather events that impacted the national corn production.   The first was a regional drought focused on Iowa. The second event was an August 2020 derecho in Iowa and Illinois causing extensive corn production damage.   Looking at the 2020 deviation from technology trend corn yield, we see the corn yield in virtually every Iowa county was below the technology trend.

202- Corn Deviation from Technology Trend

The map below, created by the CropProphet corn yield forecast model, shows the impact of the drought on corn yields.   Many counties in Iowa, some of which are top corn producers nationally, produce much less than normal in 2020 because of the derecho and the drought.

Impacts of the 2020 Iowa Drought

Impacts of the 2020 Iowa Drought

Learn more about US crop production.

Corn Production by State: A History

We have prepared a history of state rankings of US corn production.  Has Iowa always been the #1 producer of corn in the United States?

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How many acres of corn are grown in Iowa?

One way to estimate corn production is to consider how many acres of corn are grown and how much corn does an acre yield.  The graph below shows that one reason Iowa produces the most corn in the United States is that it plants the most corn.  Iowa has been the top-ranking state for planted corn for many years.

US State Corn Planted Acres Ranking

What is Iowa’s average corn yield?

Unlike the planted acres and production statistics,  Iowa does not have the greatest corn yield in the United States.   Oregon and Washington have that distinction with a corn yield of approximately 220 bushels/acre.

US State Corn Yield Rankings

How can we know state corn production before the season is over?

CropProphet is a corn and soybean yield production system designed to ensure our customers know the impact of weather on crop production.  Grain traders, grain merchandisers, and other agribusiness participants use our sophisticated weather-based grain forecasting system to stay ahead of the market, trade profitably, and earn more money.   Discover the power of CropProphet by requesting a free trial.