The value of all ranches, farms, hunting land and other rural land and acreage for sale in Stillwater County recently was approximately $96 million, representing a total of 7,697 acres of land for sale in Stillwater County. Stillwater County ranks 17th out of 56 counties in Big Sky Country for the combined amount of land currently advertised for sale. Columbus had the most land for sale. Economically speaking, Stillwater County's is largely dependent on mining and mineral extraction-related businesses and services. Stillwater County is the 38th biggest county (1,805 square miles) in Montana. It's located in the Yellowstone Country Montana region of the state.