A combined approximately 2,000 acres were listed for sale in Missouri's DeKalb County recently; the value of all DeKalb County land and rural real estate for sale was almost $18 million. DeKalb County ranks 90th in Missouri for the combined amount of land currently advertised for sale. Maysville had the most land for sale. Government and state-level services are the main economic drivers in DeKalb County. DeKalb County is Missouri's 106th largest county (425 square miles). It's located in the Northwest Missouri region of the state.