Harmon County is in Great Plains Country Oklahoma. Of the 77 counties in the Sooner State, Harmon County ranks 71st in terms of size (538 square miles). There is approximately 3,000 acres of farms for sale in Oklahoma's Harmon County based on recent Land Network data. The combined market value of land for sale here is almost $4 million. The average price of farmland for sale in Harmon County was $1 million. The economy here is largely agricultural. Farms for sale in Harmon County hold 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.