United Prairie was formed in 1996, when Unity Grain and Grand Prairie Cooperative combined their crop production divisions in order to serve their customers more efficiently. In 1997, Monticello Grain added their crop production division to United Prairie. At that point, United Prairie operated four retail locations in Illinois: Pierson, Ivesdale, White Heath, and Tolono. In 1998, Unity Grain, Bement Grain, and Cisco Co-op merged to form Topflight Grain. Then in 2009, Grand Prairie Cooperative merged with Jamaica Farmers Elevator and Fisher Farmers Grain & Coal to form Premier Cooperative. Today, Topflight Grain and Premier Cooperative own United Prairie.
Company profile
United Prairie LLC
| 2025 rank | 24 |
|---|---|
| Previous rank | 26 |
| Headquarters | Tolono, IL |
| States served | 1 (IL) |
| Locations | 14 |
| Employees | 160 |
| Founded | 1996 |
| Organization type | Independent Local Dealership |
| 2025 revenue | $201 million–$1 billion |
| Revenue by input | Crop protection 30% · Fertilizer 52% · Seed 10% · Custom application 8% |
| Agricultural Retailers Association member | No |
| Address | 929 County Rd. 700 N
P.O. Box Q Tolono, IL 61880 |
| Phone | 217-485-6000 |
| Website | unitedprairie.com |
| Data year | 2025 |
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