The value of all land for sale in Missouri's DeKalb County recently was $18 million, representing a total of 1,851 acres of land for sale in DeKalb County. DeKalb County ranks 91st in the Gateway State for the total acreage of land currently advertised for sale. Among cities in DeKalb County with farms, ranches, and rural real estate for sale, Maysville featured the most land for sale. Government and state-level services are the main economic drivers in DeKalb County. DeKalb County is the 106th largest county (425 square miles) in Missouri. It's located in the Northwest Missouri region of Missouri.