Illinois is the 5th most populous state and 25th largest state in terms of land area, and is often noted as a microcosm of the entire country. The largest cities in Illinois are Chicago, Joliet, Rockford, Naperville, Springfield and Peoria. The dollar gross state product for Illinois was estimated to be US$772 billion in 2015. The state’s 2010 per capita gross state product was estimated to be US$45,302, and its per capita personal income was estimated to be US$41,411 in 2009. Illinois’s major agricultural outputs are corn, soybeans, hogs, cattle, dairy products, and wheat. 
Wikipedia

State Department of Agriculture

According to the United States Department of Agriculture National Agricultural Statistics Service (USDA-NASS), as of February 2017, Illinois had 72,200 farms.  Illinois farmland covers nearly 27 million acres — about 75 percent of the state’s total land area. The large number of farms, coupled with the diversity of commodities produced, makes it difficult to describe a typical operation. However, statistics provide some indication about what it means to farm in Illinois.
https://www2.illinois.gov/sites/agr/Pages/default.aspx
Buy Illinois: Let’s encourage every Illinois household to dedicate $10 of their existing weekly budget to the purchase of Illinois products. If each of the 4.7 million Illinois households dedicates just $10 per week to buy Illinois Products, more than $47 million would be generated for the Illinois economy in one week! This will provide a tremendous boost to local Illinois companies — many of which are owned by your friends and neighbors.
https://www2.illinois.gov/sites/agr/Consumers/BuyIllinoisChallenge/Pages/default.aspx

Other Related Programs

Illinois consumers spend billions of dollars on goods and services every year. With an innovative and diversified economy, our state is home to high-performance companies producing high-quality goods and delivering top-notch services in every major industry sector. That’s why we launched the “Buy Illinois” initiative, a statewide series of regional trade fairs, procurement workshops and training programs designed to stimulate more in-state, business-to-business commerce and increase the self-sufficiency of the Illinois economy. The “Buy Illinois Network” is designed to continue this movement and build upon its success, helping businesses market their commercial products and services to potential customers across this great state.
https://www.buyillinois.net