Obrien County is in Western Iowa. Of the 99 counties in the Wrestling State, Obrien County is 46th in terms of its size (573 square miles). Recent Land Network data includes approximately 1,000 acres of residential land for sale in Iowa's Obrien County, which is valued at a combined $8 million. The average price of residential land for sale in Obrien County was $369,360. The economy here is principally 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.