The combined value of land and rural real estate for sale in Jackson County, Oklahoma, recently on Land.com was $16 million. This represents almost 3,000 acres of farms, ranches, and rural real estate for sale in Jackson County. Jackson County ranks 56th out of 77 counties in the Cowboy Country for the total number of acres of land currently advertised for sale. Altus had the most land for sale. From an economic perspective, government and state-level services contribute most to Jackson County's overall GDP. Jackson County is the 40th largest county (804 square miles) in Oklahoma. It's located in the Great Plains Country Oklahoma region of the state.