Of 92 counties in the Hoosier?State, Sullivan County ranks 19th in terms of size (454 square miles). Sullivan County is in West Indiana. Indiana's Sullivan County has roughly 1,000 acres of equestrian property for sale based on recent Land Network data. The combined market value of land and rural real estate for sale here was roughly $500,000. Browse all Sullivan 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 Sullivan County is house.