Mercer County is in Northwest Missouri. Of the 115 counties in the state, Mercer County is 95th in terms of its size (455 square miles). There is roughly 1,000 acres of residential land for sale in Missouri's Mercer County based on recent Land Network data. The combined market value of farms and ranches for sale here is about $10 million. The average price of residential acreage for sale in Mercer County was $756,223. The economy here is principally agricultural. Browse all residential land and rural property for sale in Missouri to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.