A total of almost 1,000 acres were listed for sale in Doniphan County recently, representing a combined approximately $7 million in Doniphan County farms, ranches, and rural real estate for sale. Doniphan County ranks 67th in the Sunflower State for the combined amount of land currently advertised for sale. Wathena had the most land for sale. Doniphan County is Kansas's 104th largest county (398 square miles). It's located in the Wooded Hills Kansas region of Kansas.