Grundy County is in Central Iowa. Of the 99 counties in the state, 501-square-mile Grundy County ranks 72nd by size. Grundy County, Iowa, includes almost 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of land for sale here was nearly $4 million. The average price of residential acreage for sale in Grundy County was $269,480. The economy here is mainly agricultural. 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.