Marion County is in Central Iowa. Of the 99 counties in the Hawkeye State, 365,124-acre Marion County ranks 55th by size. Marion County, Iowa, includes almost 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here was almost $18 million. The average price of residential land for sale in Marion County was $439,634. Browse all residential land and rural property for sale in Iowa 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.