Gallatin County is in Yellowstone Country Montana. Of the 56 counties in Big Sky Country, 2,633-square-mile Gallatin County ranks 24th by size. A recent survey of Land Network data shows 5,000 acres of farms for sale in Montana's Gallatin County, which is valued at a combined $88 million. The average price of farms for sale in Gallatin County was $5 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 individual needs.