Delaware County is in Eastern Iowa. Of the 99 counties in the Hawkeye State, 578-square-mile Delaware County ranks 35th by size. Recent Land Network data totals nearly 1,000 acres of residential land for sale in Iowa's Delaware County, which is valued at a combined $5 million. The average price of residential land for sale in Delaware County was $452,808. 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.