Of 102 counties in the state, Warren County is 49th in terms of its size (543 square miles). Warren County is in Western Illinois. Warren County, Illinois, includes roughly 1,000 acres of horse farms for sale based on recent Land Network data. The combined market value of farmsand rural real estate for sale here was $700,000. Browse all Warren County horse farms for sale on the Land Network to find the equestrian property that's right for your future needs, whether you're a horse breeder, equestrian business or simply horse lover looking for stable facilities, grooming pens or grazing pasture for your own horses. The most common type of land for sale by combined acreage in Warren County is house.