Of 56 counties in the state, Park County ranks 19th in terms of size (2,813 square miles). Park County is in Yellowstone Country Montana. Recent Land Network data includes roughly 1,000 acres of ranches for sale in Montana's Park County, which is valued at a combined $3 million. Browse all Park County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Park County is house.