Of 115 counties in the Gateway State, Sullivan County ranks 43rd in terms of size (651 square miles). Sullivan County is in Northwest Missouri. The total value of around 1,000 acres of horse properties recently listed for sale in Sullivan County, Missouri, was nearly $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 farms.