Gallatin County is in Yellowstone Country Montana. Of the 56 counties in the Treasure State, Gallatin County is 24th in terms of its size (2,633 square miles). There is roughly 3,000 acres of farms for sale in Gallatin County, Montana, based on recent Land Network data. The combined market value of farms and ranches for sale here is approximately $51 million. The average price of farmland for sale in Gallatin County was $4 million. Farms for sale in Gallatin County hold livestock including cattle, horses, sheep, goats and pig. Browse all Montana farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future commercial or lifestyle needs.