Of 56 counties in the Treasure State, Park County is 19th in terms of its size (2,813 square miles). Park County is in Yellowstone Country Montana. Park County, Montana, has roughly 1,000 acres of riverfront land for sale based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here was roughly $3 million. Browse all waterfront property for sale in Park County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Park County is house.