Adair County is in Green Country Oklahoma. Of the 77 counties in the state, 577-square-mile Adair County ranks 69th by size. A recent survey of Land Network data shows around 1,000 acres of farms for sale in Oklahoma's Adair County, which is valued at a combined $5 million. The average price of farms for sale in Adair County was $855,582. Farms for sale in Adair County feature livestock including cattle, horses, goats, sheep and pig. Browse all Oklahoma 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 business or lifestyle needs.